I think I know how I can help.
Just read this thread: https://community.ld4all.com/t/types-of-dream-control/30178
Hope that helps. Also, just as it was mentioned, in order to do something in a lucid dream, you have to really feel that you can do it. Like flying, (again, already mentioned), it takes a while to get used to but if you are really confident it will happen with no problem. My SC/DG said once in a flying dream, “Don’t lose your focus, or else you will fall.”