Your ceiling is what you make it - I think you probably can make it to at least 1600.
Nevertheless, you can let this win give you confidence and help you internalise that you have a chance against anyone you play!
IMO, consistency and minimising blunders is one of the most important things, if not one of the most fun things, to focus on in order to gain rating,
Sun Tzu said it best:
"To secure ourselves against defeat is in our hands, but the opportunity of defeating the enemy is provided by the enemy himself."
Good luck in your chess journey!
Guess what, I actually just made it to 1700. Probably going to have a drop at some point, as after a little break I only lost 13 out of 37 games (and one draw), and even won 14 out of the last 17.
But why I'm really back here is to thank you again for your comment. I've come to realize that confidence is way more important than I thought. And I think this was the start of the journey to where I am right now.
Changing the way I think and managing my emotions has helped me so much in my game, and I hope others will see this and get inspired as well. Just go into every game ready to play your best game ever. And if your opponent tricks you with a nice tactic: don't be mad at yourself for allowing it, but just appreciate the beauty of it. As paradoxical as it sounds: every loss helps you increase your rating, as it's an opportunity to learn and improve.
The best I've ever had when I was around 1300 was someone in the 1600s who probably was tilted and aborted too many games and I beat them. It is an accomplishment and at this level, I don't see someone a few hundred points above me as significantly better than me not until I reach 2000+ where it really does matter. Great win none the less