It took me about a month to get everything set up the way I wanted it and to get used to it. With Spacemacs, I imagine that things will generally be set up, but that it will take longer to get used to because it is pretty opinionated about things like leader keys. Right now my set up is good enough that if I accidentally run vim instead of emacs, it takes me about 15-20 minutes before I realise it (normally when I try to update an org mode file ;-) ).

My biggest advice is to take the transition slowly. Use Emacs/Spacemacs until you get annoyed with it and then put it away for a while. Eventually you will start to get used to Emacs-isms (like ctl-g) and Vim will start to annoy you. At that point cut over entirely.

One thing that's really annoying is that when you are modifying your .emacs/init.d file, it's easy to get it into a bad state. At that point Evil and also probably your theme won't be set up properly. So you have to fix everything using emacs keystrokes. I used emacs for 20 years before I switched to vim and even still it seems I am no longer able to use vanilla emacs ;-)

One you get it set up and are used to it, though, it works surprisingly well. For me the absolute biggest advantage to emacs is Org mode and I basically can't give it up now. Good luck on your switch!

I also highly recommend remapping your caps lock key to control.

Turn on god-mode. It turns off e.g. the arrow keys and the delete key, forcing you to use the movement keys and keybindings for deleting word, character, etc. It'll yell at you in the minibuffer with the command you SHOULD have hit, so you'll know. It builds the muscle memory super quickly.

Keyboard macros are dope. My keys are bound to f3 and f4 but I don't remember if that's standard. Basically you hit f3 to open a macro, do some stuff, and then hit f4 to close it. Then you hit C-x e to execute it from the point, and hit e repeatedly to keep executing it. Super convenient. As an example, you might make a macro where you move the point to the beginning of the line, deletes 2 characters of whitespace, then moves to the next line. But you gotta be careful it's actually gonna do what you want; you'll get better at this over time. You generally have to imagine the point exists at a random point in a line, and find how to get it to where it needs to go, before you're able to do the real work of the macro.

Get Projectile. It's fantastic for navigating projects. It binds its key prefix to C-c p, and binding ANYTHING to C-c whatever is frowned upon heavily, so be aware of that. Doing things like project wide searches (C-c p s s) is super fast, and makes navigating codebases manageable.

I LOVE Helm. It's a huge departure from vanilla emacs, so know that going into it. That said, I love what it does. Basically you have a minibuffer chilling at the bottom of the screen above the normal minibuffer, and it is usually hidden until activated. Then when you activate it (e.g. in the projectile search) it shows the results of the operation in the helm minibuffer. http://tuhdo.github.io/helm-intro.html is a good intro to it.

But really, pay attention to what you like and don't like about everything. Then find things that scratch your itches. I really encourage you to start from vanilla emacs, bringing in packages as you find you need them, so you fall onto your own unique, special editor, built just for you. That said, I sort of understand the appeal of starting with a config that's curated for you already. Though if you decide to make your own configs, use-package is fantastic for managing the complexity of it all. Emacs is a wonderful editor, and you're in for a wonderful experience. You just have to be willing to put up with some annoyance before you make it your own. As a datapoint, it took about a month and a half when I started using it to get it behaving the way I wanted. It's still a thing I tinker with occasionally, especially when I venture into a new language, but I leave it alone most of the time.

The keys I really needed out of the gate:

* F3/F4 - building macros, then C-x e to execute (after that, just plain e)

* C-s - search

* M-s o - occur (you define a regular expression, it lists all the lines that match it, so something like `def (` for python functions

C-v/M-v - page up/page down

* C-f/C-b - forward and back character

* M-f/M-b - forward and back word

* C-/ - undo

* M-w - copy

* C-y - paste

* C-o - open new line

* M-z - zap-to-character (try it, it's awesome)

* C-M-e / C-M-h - beginning/end of function

* C-a / C-e - beginning/end of line

* C-l - center window on cursor

* C-[space] - mark cursor / unmark cursor

* C-d/M-D - delete char/word

* C-k - kill line

* M-/ - autocomplete word (works in any file, any language, and cycles through suggestions on repeated calls) ... Those and then getting yasnippet installed and working was probably the most important plugin. It's real simple templates for any language and there are a lot of decent default ones. (so for instance, you type html, then tab and it'll build a basic html file for you and put your cursor in the <head> tag, or def, then tab and you have a structured function definition and your cursor stops where the name goes, tab again it puts it in the parameters, tab again, docstring, tab again, coding area).

If you dedicate two weeks to it, you'll begin to see the power that everyone talks about. The first day or two will be frustrating because even the basics I just listed are a pain to remember out of the gate, let alone have the muscle memory to do without thinking.

(global-set-key (kbd "M-P") 'scroll-down-line)

(global-set-key (kbd "M-N") 'scroll-up-line)

Has also been indispensable for scrolling (though you may choose to do so differently, coming from vim).