Hi there, I could explain every single flaw I would change but really the main point is the head position and if you focus on the one thing it’ll solve a lot of your problems.
The head position will sort out your leaning and falling over, keep eyes level, no bouncing of the body pre delivery, point the nose at the bowler, adjust from the hips to make it comfortable to do so.
The walking post shot is actually a sign that you don’t use the body itself to create power but only the arms.
You CAN keep the hands close to the body, but this has consequences limiting specifics shots you can play, like Buzz said let them leave the body slightly 1-2 inches away from the bodybut do no more than that though, it takes about 5 times more energy to hit a ball if your backlift comes from gully with extended arms and you cant pull out and readjust shots easily.
Your setup isn’t ideal, you “step into” shots rather than get the body weight into them, this is a stance issue but say if you drive a ball and I defend/punch one we’d probably hit the ball a similar distance. You jab at the ball using just the arms rather than the entire upperbody in sequence.
You have good hand eye co ordination thought for someone with your flaws so focus on the positives, change your head position, stay more still pre delivery, hire a coach who understands how to use the body better in your part of England and you could be a good player.
Good luck