Riding mongo...switch skateboarding?

okay so i've been interested in skateboarding for along time but haven't really practiced it. so i feal way comftorable riding goofy cause my right leg is stronger. but when i attempt to ollie stationary, its in the regular stance. so i tried to ride the board regular but my left leg isn't strong enough to stay on the board when i try to push off. i wobble and i don't move on the skateboard. so i tried riding mongo for regular and it slows me way down. how can i solve this, and how could i ride switch if i ride goofy but ollie regular?