Clamping help

Hello, I started doing exercises a couple months ago, but nothing really serious, before I was performing toe shield clamping every 2 days. Seeing as people online are saying growth is very very slow, I wanted to know from people who have been doing exercises for some time, what are some mistakes I should not make in clamping? I have already corrected my first mistake, which is that I need to do pumping as well as clamping.

If you could, please tell me how long it took for you to start seeing visible girth gains, and if you ever did clamping more than 3 times a day, every other day.