I never learned to mount a bike like a horse. I lean the bike to the left, throw my right leg over, straddle the top tube, use my left foot to position the pedal and then push off with my right foot (on the ground) and mash the pedal with my left. It would feel very weird to begin pedaling with my right foot and I don't know if I'm capable of mounting the bike from the right side. That would feel so weird I'm not sure I wouldn't lose my balance or get tangled up and fall.

I also put my left shoe on first....always.