You could consider watching some guides on YouTube, OP, if mechanics are particularly frustrating. There's usually a good few guides which are easy to follow and understand, and of course, you can watch it many times over to try and get it to stick in your head. It's not the same as actually doing the dungeon, of course, but I've found visual guides to be quite valuable, in addition to checking up rotations for whatever job I'm doing. I'm by no means perfect, but by and large I pootle through. You can too! Just find what works for you and aim to stick with it and improve. Good luck!