I've been in the fandom forever and it's sometimes weird to me that I've never really done anything here.

I think you'll find that you wrote an incredible Top Gear/Transformers crossover, which definitely counts.

FFXV seems like it would be fun to play in, too, but, ???? I'd get the banter wrong, anyway.

Noooo, don't hold yourself back! If you never write because you don't think it'll be good enough, you'll never give yourself the chance to become good enough!