I don’t think there’s a tutorial about it specifically but there are a few different any% tutorials that go over it, like this one: (go to 9:36 if the timestamp doesn’t work).

There isn’t a lot to it, if you’re not bonking anywhere you’ll just get better at it with practice. If you are hitting the wall or the awning at the beginning of the waterslide, you can try starting from a different floor board to avoid that.