You have a slight disadvantage to someone learning at the age of 10, because your brain has pretty much finished developing and you have already filled it with a good amount of information. That should not be any deterrent, though! With lots of dedication and practice, you should be fine.
Reading music will probably be the hardest thing to learn. Actual playing isn’t that hard to learn; it’s about muscle memory and getting a sense of how to touch the instrument. It’s encouraging that you can get a decent sound without knowing very much about playing, unlike oboe or violin where you sound disgusting for the first several months of lessons.
I started taking piano lessons at age 5. My main suggestion is just to practice, practice, practice! Instead of fumbling through your first pieces, concentrate on every single note you play so they are correct, which prevents you from making the same mistakes over and over again. And try not to get discouraged – you’re basically learning a new language. It will take time to start playing well!
Good luck to you!