Switching to Continental (left hand throw)

[MoniDew]

okay, after having taught myself to knit from a book as a child, and deeply engraining this way of knitting into my head, I'd now like to learn how to knit properly!

I'd like to learn how to knit by throwing the yarn with my left hand (instead of all that wasted motion throwing over right-handed - it's getting hard on my shoulder.) I seem to be able to knit by throwing over left, but purl is waaaaaaaay harder. And going back and forth between knit and purl is danged near impossible.

What's the secret?

Any video how-to on this topic?
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Honda T360