Thanks for the answers!
You're right I forgot to put the ESC (Turnigy MultiStar 30A BLHeli_32 4-in-1 Race Spec ESC w/ F4 FC, OSD & BEC (2-4S))
(Edit) Would a FC like this do the job?
MATEKSYS Betaflight F405-CTR Flight Controller w/ OSD, PDB, Blackbox & BEC Current Sensor
For the 3d...