That's pretty good starting out and at 12. It took me a year to break 100 at easy courses and I had the strength to hit drives 280.... yes, I lost a lot of balls.
Keep working at it and have fun. If you ever get a chance to have pro take a look at your grip, setup and fundamentals, take advantage of it. I know in my area the "first tee" has all kinds of free lessons and clinics for the kids. Unfortunately no matter how close I shave they still won't let me sneak in.
I know there must be some really good instructors there though. Some of these kids have swings that scare me. If the rest of the country is like this... Tiger's records will fall like Jack's inevitably will and Tiger will see it happen.