I did have more than half an inch on newbies routine gain before slowing down, but then I added only two exercises besides jelqing and stretching:
1. PEI streaches when I pee always and whenever doing them crossed my mind and I had privacy
2. Clamping but never longer than 10 min at first
I never bought a clamp at first I only used basic tape which I don’t recommend but it never made me any problems.
Later I found a strip for a bra which had two plastic things that fit in eachother and can be adjusted very easily and much more comfortable.
In one year I had 4 cm length and 2 cm girth gain.
Try this because I never hit a plateau doing this and grow almost as I did as a noob nonstop:
10-15 minutes stretching in all directions
10-15 min jelqing
Then three sets of 10 minutes clamping with kegels, 10 min rest in-between
While clamping when my PC and BC muscle get tired I just wank the damn thing not to lose that 115% expansion only to kegel as soon as I can, this way you will never lose the erection
Later I added clamped squeezing for my last set to get maximum expansion.
Through all day do pei light stretching and I can’t see the way for you to not grow with this.
I hope this works for you if you ever try.
Again pei and clamping, just do it uli thing is lame compared to this.
Always stretch and jelly and then clamp because clamping keeps your penis in maximum expansion both girth and length wise preventing turtling.
Good luck