I had a little trouble with this some years back. My advice would be not to put too much of yourself into the game, just treat it like entertainment and have fun. If you’re not planning to be a regular tournament player, then why put that kind of pressure on yourself? Enjoy the process of getting better and playing well, win or lose. Even if your goal is to be a tournament player, I would recommend the same mentality.
Also, over-training is another issue. Nowadays when I play a new fighting game I try not to stay in training mode too long. Go through your character’s moves a few times and get familiar with their moves, make a simple game plan (pokes, anti-airs, BnB’s, etc.) and get the hell out of there and start playing some single player modes for a while just to get comfortable using them without overthinking. Don’t expect too much, and just focus on executing your basic stuff and you’ll get decent pretty fast (especially if you’ve played a lot of fighters in the past, there’s a lot of carry-over even between different series). THEN go back into training mode and you’ll have a lot more idea of what you need to work on in there. Again, don’t live there or you’ll get too “stiff” when playing. Good luck