[p1esk]

What does it mean "plug in a server into it"? I looked at the page you linked to, and I have no idea what any of that means, or what to do with it.

I just want some basic stuff: autocomplete + indentation will probably achieve 90% of what I want from a Python IDE.

[falafel]

This refers to the Language Server Protocol [1] which is intended to decouple the IDE features from your editor so you can use it with any editor, such as Vim.

[1] https://en.wikipedia.org/wiki/Language_Server_Protocol

[read_if_gay_]

Check out coc aka Conquer of Completion