Good gains with fast size alone?

I'm sorry if I came off as rude, I'm just a natural skeptic. With so many fake products for penis enhancement and so many people who are PAID to go around spamming fake reviews for these products, its hard to know who to trust. Anyways, manual stretching doesn't seem to be working b/c I can never stay flaccid, and if I stretch at all semi erect, I get little burst blood vessells on my dick. I have a fastsize, and if anyone has any tips to make gains fast as possible, and safest ways of wearing the device, it would be really appreciated.