I just now discovered that vimtutor exists. Is it weird that going through it makes me feel more like a hacker than writing actual code?
I did the same as you, I went to mastodon.social. Then I went on a bit of a tour to two or three other instances trying to find a good mix of technology and social activism. Landed at mastodon.social... My follow timeline and the federated timeline are the same, but the local conversations are more my speed.
Follow friends and discover new ones. Publish anything you want: links, pictures, text, video. This server is run by the main developers of the Mastodon project. Everyone is welcome as long as you follow our code of conduct!