I've been using Vim and vim-derivatives almost exclusively for the past 15 years, and I think none of the things you mentioned are important to use vim.
The first and most important things to understand are:
- Normal mode is the default mode. Only leave it when you already know what you want to write.
- Movement follows the [<count>] <verb> <target> model. The most used verbs are: d, y, p
The most used targets are j, k, f, F, /, w, W, e, b
Other useful keys to know and use: a, A, o, O, *, ., %
And lastly, learn how to use macros! (q, @)
If you just learn everything I listed here (and it isn't much), until it feels natural, you already know 90% of what you need to boost your editing speed and use vim like a pro.