I need to borrow my 4 year old’s attitude. I’ll often hear something like, “I’m good at jumping!” Then he’ll demonstrate. And it’s not an especially brilliant example of jumping. But he completed his objective: he jumped. And he had fun doing it.
If I applied the same attitude to my writing, I think I’d feel a lot better about it. As in, the words themselves don’t have to be prize-winning. I just have to do the thing - write - and have fun with it. I reckon if I do that, I’m “good at writing”.