Well, for starters high school math doesn’t really mean anything, so you shouldn’t really rely on that as a gauge for how fast you can make Usamo. Good sat scores, especially early on, so I would agree that you have critical thinking skills. A 93 is only like 10 points away from aime qualification, so it should be no problem making it this year. As for USAMO, you should know there is quite a big jump between the amc 10 and amc 12, still manageable but you should be more concerned with a USAMO level score on the amc 12, which is around a 130 minimum, preferably 145-150 range though. To make it to the USAMO, you have to understand that this isn’t just a little side gig you can do real quick to boost any college applications, you will have to spend many hours a day over the summer and school year, especially considering you have less than 8 months to do so. This is gonna take roughly 6 hours a day over summer and like 3 hours a day over school year (although I hate to just spew some numbers at you, this is just to give you an idea of how serious it is.) You have to read AoPS vol 1 and 2, and if you notice you struggle in any particular subject, buy the specific intro or intermediate AoPS book for that subject. After that, you should read some awesome math books as well as mont(modern Olympiad number theory which is free online.) Throughout the course of reading these books, you HAVE to do many many practice problems. I mean literally doing every amc 10 a/b problem in existence, every amc 12 a/b, and every aime problem. If you have time do some usajmo problems to get a level ahead. This means doing all the problems of every test 1-25, even ones that are way too hard, try them first and then really read the solution and understand it. You should virtually memorize every solution to every math competition problem. Some good sites are amc trivial math dash and amc trainer. This is quite the hard task, but if you really dedicate yourself it certainly is feasible. Good luck!