i looked around a bit, and i found in the guides section, theres a reddit post. It says a few things about running celeste, primarily about how serious you are about it. I decided i was gonna run it "somewhat casually". I already knew advanced movement before I wanted to start running, so the only thing i needed to know was some of benteezy's chapter guides. Unfortunately, both the "where to start" guide and "benteezy's chapter guides full playlist" were posted 2 years ago, so im not sure if they are the most up to date info. im really confused as to what im supposed to do. Does anyone know what the most up to date info for beginning celeste speedrunning is?

That Reddit post is still mostly accurate, with the main exception being if you want a full-game tutorial Programmatic's would probably be better to watch nowadays.