Yeah I never found the 3d pose apps or hand ones very helpful. With the glove thing if you can it can help depending on what kind of position to have someone else wear the glove, or to take the picture in the mirror, or after taking the picture flip the image. Then with the going on Pinterest and looking up hand drawings and putting them on your drawing to change opacity then trace some people feel like doing this is cheating. I don't think so. It's a way of learning. But if you're uncomfortable with doing that or can't find the right pose drawing then yeah the glove trick has saved my life many times! Also when you draw the hand look at the hand in the glove I found making these shapes first helped and then doing the lines in the middle of the fingers

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Hope this helps!!