As for "tweaking" Vim, I'd suggest checking out open source vimrcs, like ThoughtBot's or Steve Losh's. You should also browse vim.org/scripts and check out plugins by people like Tim Pope and Junegunn. I can't think of any at the moment, but I know I've seen analogues to ruby-toolbox.com and clojure-toolbox.com which index plugins and let you search by topics and are a little more curated and user friendly than vim.org. You may also want to consider an opinionated Vim distribution (Janus, Space Vim, etc.), which comes with non-standard .vimrc settings and plugins.
Over time, you will accrue the things you need to know to use vim effectively.
A big tip I have is watch youtube videos and search new tweaks. While learning commands add a few on a post-it note and use that for a week. After the week is over you either learned those commands or aren't using them and don't need them.
https://stevenwalton.github.io/tutorial/vim/2019/08/31/vim-b...
[0] https://stackoverflow.com/questions/1218390/what-is-your-mos...
https://vimways.org/ is also a great resource. 'Death by a Thousand Files' in the 2018 edition is one of my favorite vim articles.
Open vim
Hit i
Type the things you need to type
Hit esc
:wq
Continue like this for a few days (maybe even map the arrow keys to hjkl, like a heretic), then I'm sure you'll think something along the lines of "hmm, I wonder how you do X in vim" learn that and continue along.
That's what I did all those years ago.
`vimtutor` is the official starter guide
:help is an inbuilt manual, with a section for every topic you could think of