Not at all bad for being 14.
To add to the replies above; try to pay a little more attention to parts clean up and orientation.
Carefully remove the little tabs from the wheel hubs. They'll look a lot better.
You have placed the towing hooks on the rear plate upside down. If you can do it without breaking them, pop them off and flip them around.
The way you arranged the wheels with the rubber tires looks interesting but is not likely to have ever happened. The "normal" arrangement would have been one rubber tired wheel on the first station and one on the back. This was done to reduce the vibration caused by the tire-less wheels which played hell with the tracks, the mechanics of the tank, and the crew.
The nice thing about these Tamiya kits is that you can just pull the wheels off and switch them around! No fuss at all.
Clean up, clean up, clean up! Once you've gotten all the little seams filed or filled, and all those little nibs from where the parts attached to the sprew filed and sanded away you will not believe how much better your models look.
Once you've mastered that easy though time consuming part of modeling you can move on to the hard work of mastering weathering.
Best of luck with your hobby and keep plugging away!
Mark