clayton_crowder,
As the other 2 have said, you got lucky that you got it back in one piece. But just because you got it back down doesn't mean that you are finished with your training. Please got back and let your instructor finish your training, if he will finish with you. Your not knowing how to adjust the motor is evidence that you still need more instructions, this is just one of the many things an instructor will teach you. As far as learning to land, you don't learn everything in one lesson at the field. Most instructors will teach you and advance you along as your skills improve.

This may sound a bit harsh, but that's not the way that I intend it. Going back out after your instructor left was a bit reckless on your part. If nothing else you ran a good chance of losing control of your plane because of a low battery. It sounds like you had quite a bit of time at the field with your instructor so your battery was probably getting close to being too low to fly. Taking a plane back up in a condition like that is reckless. As I said above, you got lucky that you didn't lose your plane.

As agexpert said, it's probably a good chance your instructor won't take you back. When I am teaching a student to fly I have 3 rules that I lay out to them from the start. One of those rules is if the student comes out on their own to fly before their training is done, then I am finished with them.

My advice would be to go back to your instructor and ask him to finish teaching you to fly

Ken