There really isn't any way to know, especially with one game as an example, until you get a USCF membership and start playing other members. Online or OTB, the pool of players you play against, time controls, etc all influence one's ratings.
What USCF rating do you think I play at.

It didn't come up as brilliant when I looked at it, maybe you need to run the analysis at a higher depth? Cool game tho!

That game had a lot of forcing moves. Based on how much time was on the clock looks like you had time to figure out Rxc2 was good.
my uscf is 1449.
chessco: bullet 2150+ blitz 2150+ rapid 2150+
lichess bullet: 2150+ blitz 2350 rapid 2350
if that helps as any reference.
Mine keeps fluctuating. But I was about 816. I keep losing points for losing endgames to 1200-1300 players

my uscf is 1449.
chessco: bullet 2150+ blitz 2150+ rapid 2150+
lichess bullet: 2150+ blitz 2350 rapid 2350
if that helps as any reference.
When covid started my online ratings on both sites were slightly higher than yours, and I was 1600 uscf, now my ratings are still the same but I'm 2030 uscf. I think you have the potential to climb up very fast, maybe you just aren't used to otb?

@B1ZMARK - exactly right. The OTB environment is much different than online and until you get enough experience in both formats, most players I know have a significant diff in ratings for the first several months (or longer depending on how much OTB time they get). Also, I can play at most one USCF OTB tourney a week (lucky to be close to a club that hosts tournaments every weekend), assuming I had every Saturday or Sunday available. But I can play everyday online and even 4-5 times a week in a USCF rated online tournament. Not to mention the time controls are often different OTB versus what you find online.
https://www.chess.com/analysis/game/live/51926999105
I'm confused at how Rxc2 is brilliant, its common sense, but i mean, ill take the brilliant move.