Is a 30 ping okay for Fortnite?

I have a constant 30 ping in progress, and I wanted to ask if it is good to play or rather not

Yes, you can still play well with it, from 70 it becomes critical or you can see blatant differences.

Play minecraft, because you come with a high ping quite well

So I'm still well off with 50 ping and you shouldn't feel anything?

Yes