I saw a introduction video of super launch and finally could do it once. However I can't do it again. Are there any ways to stabilize it or I just need to practice more?

For a super launch to work consistently you need to be looking at a lag source, like a forest. Because superlaunches are pulling the glider out on a lag frame

Thank you for your reply but I actually know it.(the video told me that)
I think I know the basic mechanism of it.
I mean, are there any tricks or something.

Idk

ok, I might as well practice.

It's possible you just need practice with pulling glider out of the menu and that's the issue? It's hard to tell what's going wrong without a clip though. If you join the community discord and describe the issue you're having with a clip, there'll be a lot of people that could help you out

That's the first time I heard about it.
How can I join it?

there's a link to the discord in resources

@cobwomscobwoms ???????

That is not how you find a game's Discord. The invite is found under a game's follow button

it is in both places then

thanks