You will hopefully be programming for decades: I have been programming already for three decades and I expect I will be programming for another two before my mind gives out (if I am lucky, I might get another four). Customize your tools: they are yours, and being able to continue using and improving your workflow over time isn't a distraction if you are in this for the long haul.
I have programmed for 20 years professionally (and a few more). I have the exact opposite approach. I don't even learn ketyboard shortcuts, would never customize my environment even a little (like moving a tool window around in an IDE) because it just doesn't stick. The difference in philosophy is probably because I'm a windows dev and I just don't have (or trust) there to be a persistent settings storage. The small papercuts of not customization it is less annoying than the constant re-customization required when it keeps breaking, or you use a different machine. There is no real dotfile system, the user profile directory is a mess and even if it is, applications usually don't bother to maintain their settings and compatibility. So my philosophy has basically become: change nothing, and everything will look your way even on a clean system (and after the next upgrade).
The core point is overall productivity; it may still be more productive overall not to know some tools extremely well.