I'm glad it was a simple fix.
Don't beat yourself up too much - let us help!!!
One more shred of advice: if you run standard fuel in the bike, run it often. I just bought a third TT250 for my daughter. It's a 2021 with 93 miles on it. The previous owner put a tank of standard fuel in it, rode it a little, discovered it didn't suit his needs, and let it sit for a month without running it. My first trip out with it was a bit harrowing. I could tell the main jet had already started to clog. The engine kept surging and backing off, then surging and settling down. I drained out a gallon of fuel and dumped it in my pickup. I filled the tank with ethanol free and let it purr in the driveway to dilute the original fuel. It seems a bit smoother now.