Casting on is one of the few times where the left hand may be used regardless of whether or not you knit Continental (left hand yarn holding) or English (right hand yarn holding) style.
Other than that, all the Continental ideas are easily transferable to English -- only instead of hooking yarn counter-clockwise (or clockwise, depending on how you knit; I do counter-clockwise) from off your left index finger when you pearl or knit a stitch, you wrap the yarn around the needle with your right hand. I was taught English style; all the concepts are otherwise the same.
As with anything new in knitting (whether you are learning something for the first time after a few weeks of knitting, or after a few years) it takes some time to go from fumbling to easy grace... even after knitting since I was a little girl, it takes me forever to learn something new sometimes. Just stick with it!