I'm in UK but I presume there will be adult competitions here I reckon, not just at the higher levels.
I can land all my single jumps (except axel) and can do upright, scratch, sit and camel spin. Also three turns, backward three turns, mowhawks etc.
I'm not sure what level I'm in on the USFSA system, I think I may be past the basic skills (i hope )
But my coach says I've left it too late to be competing, I don't know if he means at big competitions or locally, he wasn't specific. But I know of a few adults who are slightly better than me who are competing around the country at competitions (some are in their late twenties and have only been skating a couple of years)
I am in the UK too. For the adult competitions you are too young. But you can compete on any open. My friend is 19 and she competes at opens with kids because she is still too young for adults. I know it sounds awful to be competing against kids, but the categories are not only according to the level, but also according to age - she was with 13 and above, so there is obviously age difference but not so huge. (in the adult category you sometimes compete against skaters 10-15 years older or younger, so skating with 6 years younger children is not as bad as it sounds).
Adult competitions are usually with levels pre-bronze, bronze, silver, gold, masters. You would fit into pre-bronze or bronze. The bigger competitions are split into age categories.
Children's competitions are usually according to NISA test levels. If there is enough participants, they split it to age categories. If you haven't done any tests, your category would be called beginners.