If you were to truly knit left handed then everything would be sorta backwards, but English and continental are just different methods and can be done by either left or right handers. With english you carry the working yarn in your right hand, continental the working yarn is in the left hand. Knowing both methods is valuable for certain things like stranded knitting (fair isle), but most of us choose one method for all our basic knitting.
I know of only ONE person who truly knits left handed and she has to alter patterns a bit to make it work since most of them are written for right handed. It sounds like you're getting the hang of it anyway.