Is there any fun games to speedrun that are easy to get into?

yeah

https://www.speedrun.com/speedrunning/thread/pt010 Check out section 1.

https://www.speedrun.com/kirbymeme

The only game you'll ever need.

But seriously, do check out the Advertisement thread: https://www.speedrun.com/speedrunning/thread/hl23s/1

Here you can find plenty of speedgames, all of them looking for more runners.

@ O.D.W that's part of the FAQ thread

I know, I'm just seconding the recommendation to head there.

Advertising the Advertisment Thread is a certain kind of irony

@PlushieMasterYT if you want to run games on a specific console, check out section 20 of the FAQs https://www.speedrun.com/speedrunning/thread/pt010/1#iyhcu