Thanks for all the comments! They’ve been very insightful. Here’s a mini-update: I’m doing fairly well in my BC Calculus: 97.6% for first quarter, 98.5% for the second. Mainly I make little mistakes that cost me a point or two on tests. I’m doing mostly fine in all my other subjects. I’m taking my grade-level (8th grade) in other subjects and am mostly a straight-A student.
There’s a sophomore in my BC Calculus and as they will finish math by junior year, they’ve planned to go to the state university which is a 10 minute drive in their senior year. I think I’ll try tag along with him for my 10th grade year. If it ends up not working for whatever reason, I’ll probably take some online course.
Here’s some mathy background info about me for anyone that wants to read (maybe for parents who have gifted children — there seem to be many around here):
up to 3rd grade: my parents taught me some math to supplement what I was learning in school and “prepare me for next year”, but it was only 1 or 2 grades advanced. By 3rd grade I think I was doing arithmetic with fractions, learning how square-root worked, basic prealgebra, etc. I was pretty much “the smart kid in class”, but not much else.
4th grade: My parents discovered AoPS, so I started doing Alcumus on it. In about a year, I had mastered all the Intro topics (all except Inter Alg and Precalc). I also got a personal tutor to help me.
5th grade: I took the AoPS Precalculus course online since the Inter Alg wasn’t running. To be honest, I understand very little and asked for help on just about every problem either on the community board or with my tutor. However, it made learning precalc later a lot easier later in life. I also scored a 91.5 on the AMC 10. My real score was ~70, however I somehow randomly guessed like 4 out of 7.
6th grade: I took the AoPS Inter Alg and I understood it a lot better. I also took AoPS Inter NT. I scored 103.5 on the AMC 10, 17 on the AMC 8. My AIME score was 3. Since I was still in elementary school, I couldn’t take advanced math so my teacher let me skip math class and do my own math instead.
7th grade: Since I was in middle school, I initially wanted to take Algebra 2-Honors, however my teacher suggested that I take Precalc-Honors. It was a lot harder than I expected. I failed a test and a few quizzes, but I was eventually able to bring my grade up to a 94 by the end of the year. For competition math, I mocked a few AMC 10’s and AMC 12’s as practice, but didn’t have much time to study. I scored 90 on the AMC 10A, and 100.5 on the AMC 10B, and a 23 on the AMC 8. My AIME score was 5. I also tried MathCounts. I got first in my state, and got 47th at Nationals.
8th grade (now): During the summer, I tried AwesomeMath online. I took Algebra 2.5, Geometry 2, and Combinatorics 3. It was really hard and tiring (~4.5 hours a day of lecture, group problem set and HW), but I think I learned a lot. My AMC 10A score was a 114 and my AMC 10B score was a 111. I hope to get a 8+ on AIME, but obviously no guarantees.