Want to learn the game but the discord link doesn't work and there aren't any guides on the guides tab.

Try this link https://discord.gg/YajQSV8

The Discord has a bunch of resources for this and other games in the X series, there's a pretty recent video tutorial for X 100% and an old but still really good one for Zero 100%

Here's an older guide for Zero 100%, I think it's pretty accurate still:

Here's a new guide for X 100% which is basically entirely up to date: https://www.youtube.com/playlist?list=PL3TS9igI6II4394D2QnXWZR_krNolppMr