Hey Josh and welcome to IIS! Im 15 also and i just recently received a 5" GOTO Reflector for christmas to get me started in astrophotography and so far i have taken images that have amazed myself and my friends and family! If you want a telescope for astrophotography, i'd consider getting a 5" or bigger on a GOTO mount or a EQ6/EQ5. This will allow you to track sky objects and take long exposures without star trails! I have managed to get some quite amazing shots through a 130mm reflector on a GOTO mount.
You can find some decent dobsonian's and reflectors with GOTO mounts for around $1000 and even less
I'm not telling you to buy these, I'm just adding an option to yours
-Sean