Hey Andy,
Yes, position shooting is difficult, and only practice, practice, practice will help you improve !
Prone, or laying down is the easiest to learn, as almost everything is supported by the ground.
Sitting and Kneeling are the next most difficult. I have had to endure mush pain in the kneeling position due to bad knees. But they are the next most stable positions.
Standing, as we all know is the most difficult position, as the only support comes from your feet, connected to the ground. Practice is the only answer along with exercise, to strengthen the muscles of the body to keep everything in alignment.
If you are interested in an easier, or differenttype of match, propose what you would like to shoot, an see what interest others have in joining you !
Bill