How do I get better at Fortnite? I'm not that good?

Will play with my friends but not so good?

Better play something else, the game is not worth your time

I have not played this yet,
just skate on XBox

Well, it helps to practice.

You can practice building on what I call Spielwisn. But the weapons are something else. First, you have to find the right target speed for you and also weapons that you can handle well. For example, I can deal well with semi-automatic and shotguns.

So practice and try. Nobody is born as Fortnite Pro.