All this talk of bots is making me want to make one... Is there any good "where to start" type stuff around?
Here's a collection of tutorials: https://botwiki.org/tutorials/twitterbots/
If you're looking to make an 'art bot' that says interesting nonsense based on rules (rather than a markov bot that says interesting nonsense based on somebody's posts), I recommend using CheapBotsDoneQuick, which uses tracery:
If you want to make a markov bot, on the other hand, I recommend trying this: https://github.com/Lana-chan/mastodon-ebooks.py
(I don't have much experience with it, but lots of people are using it so it shouldn't be hard to find support.)