I had all sorts of issues too, and what really helped was breaking things up in it small pieces no matter what aircraft, and lots of tutorials and taking notes... Making little checklists that I could consult when learning a new task. Having said that, the A-10C is a huge pain to learn. I would suggest the Hornet instead. Similar systems to many other planes, very easy to fly, much easier systems to learn than the Hog, and there are a ton of tutorials out for it. Bonus points for it being incomplete, so there is less to overwhelm you.