I agree that a gap year to do ice skating won’t help your application unless perhaps you compete and win at a national level (ex, US Champion). Taking a year off for regional and local competitions and to teach skating won’t move the needle on where you can get in. In terms of the SAT you can take the next exam offered and see if those scores improve and can help RD applications. As others said, you are best off applying to schools now and once admitted you can explore taking a gap year.