I would recommend starting here - Aerial Photography forum
- to get some idea of what aerial photography involves.
Then here - Beginner Training Area (Aircraft-Electric) forum
- to find out about model aircraft and how to fly them.
Flying radio controlled planes is not easy, building one with no previous knowledge is extremely difficult.
One possible route is to purchase a ready built model that is designed as a trainer, learn to fly first, then expand on that by adding a camera and possibly stabilization equipment if required.