how do i build an FPV drone?
The most basic type of FPV Drone is a quadcopter that flies using only visual input from the camera.  There are many different types and configurations available online or in stores, you should be able to find one which suits your needs by searching for "FPV Drone" or something similar.

Here are some steps on how I would go about building it:
1) You will need four servos (two each at 120 degrees apart around two corners), 4mm carbon fiber rods or wires, nuts/bolts, washers, bolts with locknuts. 
2) Cut up the wood frame into strips 2cm wide, attach them together to form the main structure, use wooden screws to join all the pieces. 
3) Use 10cm long and 1cm diameter carbon fibers to make arms, connect these directly to the main structure, you can add fins if needed but this depends on wind conditions. For stability use more than 1 arm. 
4) Use 8cm long and 0.5cm diameter carbon fibers as the propellers (make sure they have no sharp edges). Attach them to the arms so they point forward. If desired you could also mount a GoPro gopro Hero 3+ camera onto this drone too!