My advice...

Coasting is habitual and so it can't be stressed enough that you cannot coast. Your singular focus when when starting to pedal therefor, is to get your weight off the pedals and onto the seat. Start with your dominant foot, begin to pedal and sit immediately, before the pedal gets to the bottom of the stroke. If your weight is still on the pedal when it comes up it is going to lift your whole body and has the potential to launch you. Don't worry about your non-dominant foot but worry about sitting first, then worry about the other foot.

Buy spare brake pads. Feathering the brakes on the downhill wears out pads faster than on a road bike where you don't use the brakes as much.

@TejanoTracki is 100% correct about clipless pedals.