Even if the following were not the case, as literally everybody else has said, no.
There are so many lifelong, hardcore skaters who are not "good" at riding skateboards. Like, I feel like everyone has a friend who skates who "can't" skate. It's very common and it's awesome.
The only question of how worthy YOU skateboarding is, is is skateboarding enjoyable for YOU? (I've never used 'is' three times in a row in a sentence ever - was that legit?)