need more girth

Hey guys I’m new to this PE thing, I’ve been doing it for last 3 weeks and I do feel that my penis is harder but still don’t see any size changes. I’m 6.25x5 and i want to be 7x5.5 at least this is my first goal, my PERFECT size I would like to have is 8x6 if I had this size i would be in HEAVEN. Well now I hear that gaining girth takes a very long time. Anybody knows how long on average to gain 0.5 inch in girth? Is it possible to gain an inch in one year in girth? I mainly do jelqs and some ulis. Any other exercises for a newbie?