See if your servos fit in the model, and how they would fit, and if they can provide the motion you want. Make sure they're strong enough as well to perform the movement - a shoulder servo will have to move the arm plus the servo in the elbow.
Get one servo to work. Should be easy. Remember to separate power supply from the servo(s) from your Arduino.
Then get them all to work at the same time: each following a different sweep/pattern. You'll find this is A LOT harder already.
Now you got a hang of controlling the servos, start thinking actually building them into your model, and wire them up.
Then test each one of them, figure out (and write down) what angle gives what movement: directions, limits.
Now the fun part: make one or more programs for movement. This is where the fun begins. Think of how you want to control them: what commands it should receive, what it should do. Individual controls (move head, move arm) or complete pattern (dance the boogie, perform a Bruce Lee style kick).
Finally attache the bluetooth part, so it can receive these commands. It is easiest if you can reduce all commands to a single byte (giving you 256 individual commands). Otherwise you have to use multi-byte commands and deal with start/stop markers.