I haven’t done an online class. But I did take a class from a Laura Heine certified instructor. I was not overly impressed with that style. Then again, I’m not a huge fan of Steam A Seam. There, I wrote that out loud! I know many who swear by it. I’ve made several collage quilts before the LH class and a few since. Like you I’ve watched several videos on each persons style and technique. Then I made my own style combining bits and pieces from them. I would make a suggestion to try a small, say 8” x 10”, simple vase with flowers and play with different methods and see which you like. Or if you have the funds take a class from a couple and see what you like. Just my two cents worth.