I personally believe your original issue is one of focus and concentration. I have this issue too, mostly with flying and psychokinesis. I try and focus, to propel myself upwards while flying, but I tend to get stuck at 15 feet in the air, then start floating downwards. With psychokinesis, I’ll start moving something, and either it takes more force than it should at times (a less common issue), or something else will happen because of my moving of the object. Like gale-force winds blowing in a sealed room.
All it really takes is simply concentration, and quite a bit of focus on the task at hand.
One way to increase your focus is to meditate, and concentrate on a single image, blocking out everything else. But for that to work, you really need to banish all other thoughts. It might take a bit of time, depending on how laid back your thoughts are.
However, one way to resolve your door-demons is to do the RC mentioned here, except with your friend instead of the doctor:
https://community.ld4all.com/t/technique-to-summon-creatures-or-people/34836
Hope this helps 