Those of you who’ve seen progress using the Home Depot clamp, walk me through this

I have an odd dick. Definitely not as thick as I would like. 5.25 base but narrows down to 4 around the head. The largest I can get my head is with the clamp on and jelqing so that the foreskin clumps up around it. Then it’s like pushing 5 around. But skinny dick. Big difference between putting in the first 7 inches and the last half inch that’s the full 5.25. To make matters even worse, it’s curved slightly to the left. Anyone with similar dimensions and experience with clamps and pumps?