I'm at it again - Tell me what not to do

Back when I was 13 I got into PE. I had a very, very bad routine that consisted basically of jelqing. I did erect jelqing back then and I’m pretty sure that screwed my dong up. I could measure 15 to 16cm back then, but now I can only get 13.5 to 14cm. That’s not a lot. I’m having way more sexual experiences now (am 20) and yes, size matters. So I restarted at 10/01/18 with the newbie routine. I would very much appreciate your insights. What gains should I expect for the first 3 months? If I don’t get any length gains on the first month, how do I cope and motivate myself to keep going? I want to learn from those more experienced than me. I need a 18cm dong. This is it.

Well just remember. PE only works over the long term. Its like working out. There won’t be a big difference in a short while. It took me 6 years to gain 3.5 inches or 9 cm. I’m still going for more though. Even though I’m not sexually active at the moment. I might one day meet someone special and that can change. So that’s my motivation to keep going.