could be done in a month but isn't this kind of designg seems a bit too hard for a beginner (in programable electronics or electronics btw)
I mean, driving 8Amps circuitry on pcb isn't easy,
Burning parts is (if you need help on this i know quite a part about it)
If this project is personnal, what about aiming a little lower

"triing to eat a dragon, you often finish rosted, what about just a rabbit ?"

Good luck anyway