You may be better off with poor viz, it will force you to concentrate on the suit while you learn how to use it.
This is a thick neoprene suit if I remember right, if so the thickness can make things feel different and you’ll learn how to work with it, maybe move the D-rings down a bit and practice. The right undergarments will help with a bit of slip and slide to help your movements. You may want to try some conditioner rather than shampoo on the wrist seals, it slides better and last a little longer.
It's made of 5mm hyper compressed neoprene. With my makeshift undergarments on it feels like a snow suit, but less "puffy". Its more forgiving than the 7mm that I'm used to, and about the same in the elbows. I'll give conditioner a shot and the baby shampoo. My wife said I looked pretty professional and then she didn't take any pictures. Amazing because she takes pictures of EVERYTHING!!
A bit more slack in the harness as well as a tad more air in the suit may help it slide more easily over your torso for flexibility. Think like shrink wrapping before and after you've pricked the bag. Disclaimer, don't prick your bag
The harness needs to be more loose ever so slightly. I can almost fit 2 fingers comfortably in it with the suit on and just about pull it off my shoulder comfortably. I'm thinking a little more loose would help the D ring situation. More weight would allow more air in the suit, although it never really got "uncomfortable" due to squeeze.