Suggest Treatment For Phimosis

Hi, what is the best way to cure Phimosis. I was told that when I was a baby I always had a tight foreskin, I've just researched a bit and found that if you masturbate by rubbing the head of the penis, it responds to covering up and gets tighter. I've been doing that since i was 13 now I'm turning 16. I went to a doctor to check up on it and he said that it was completely normal, when i was soft he fully pull my foreskin back but it was a little bit painful. He told me when I get home get some lubricant to help stretch my foreskin when I'm having a erection.

I did some more researching and people say it took them 6 weeks to get their foreskin back. At random times I would put an hour or two to stretch my foreskin when erected. So far not much progress, i could not even see the head of my penis. Its been roughly 2 weeks I've been doing this and I want to know if I'm doing it right or not. I still have not pull back my foreskin when its soft because i think it was a waste of time.

Additional Details: Weight: 100kg Height: 170cm
I also found that that i had to loose weight to help my foreskin. I go to the gym 3 times a week but only do weight exercises but always finish up with a few minutes of cardio.

I'm pretty worried if I'm not doing this right and I do not want to be circumcised and would like the fastest, safest, most effective way to fix this. I would really like my foreskin to freely feel free without any pain because of my tight foreskin. If you could provide any further tips or treatment and tell me if I'm right or wrong about the way I'm thinking please do!
I would really appreciate if you spent time to read this and help me out.