As with many Twitter users, I'm finally at the point where I want to leave and join Mastodon. About a year ago I set up an account after seeing some people on Tildes talk about it, but I found it confusing and ultimately closed the account. I want to give it another go, but I'm a bit confused about all the different instance options, what the practical differences are, and more. Are there any comprehensive getting started guides? Does it matter which instance I join? How did you choose for yourself?