I'm not sure you should say you were doing it wrong all these years...you were just doing it differently! Did you like how all your crochet items turned out? If so, then there's nothing wrong about that! There are so many different variations in both knitting and crochet in how different people hold their yarn, their hook, insert the hook, pick up the yarn and it just goes on and on! If the results are pleasing, then it's all good! Just enjoy doing it, and sharing your skills!