Hi I'm new to drones and have no clue how to fly them tidy. Hi flew the sparks the other day an it went nuts, it crashed an I managed to find it but now I can't start it back up. I've gone in to go 4 app an it says main controller error. I've in to calibrate it want calibrate imu want ither. Plus ESC got error to any ideas wot I'm doin wrong. Like I said I like drones but can't fly them .