I'm intending to build an ALZRC 450 Pro V2 fbl combo kit. (Clone of T-Rex 450 Pro)

I'd very much appreciate some recommendations for the electrics (rx, servos, gyro, batteries, etc). I'm using a Spektrum DX6i tx.

I'm a complete tyro and this will be my first build having only gone for RTF so far.
TIA, Ken