Don't learn the opposite way... yet. It's best to go to your back-foot side so you don't (as you say) hit your pedal on the way up. If you sidehop close to something (you may have to, in comps for example) then it's best to have the pedal clearance.
As for the mech/QR, most of us have done that. I ripped a nice new Hope skewer out of the backwheel once, but that can happen either side. Probably best putting the cam/lever bit on the non-drive side if you're hopping to the right...
Once you do get sidehops dialled, it isn't that much harder to go the other way. A weeks practice and you'll be doing both ways to a similar height.