while you can look at the guides in any order there is a way that I would recommend to look at them.

  1. The Celeste speedrunning resouce guide
  3. (english subtitles)

before your first speedrun I would make sure you have some way to record your run so it is sumbmitable to speedrun.com. Look over this form then you can go for your first speedrun.

Have you completed all these steps?

A recording software
Decent understanding of Celeste movment
A understanding of the specfic route you take for the speedun.
A photo of the Celeste logo with the text Have a good run on it.