Hi slyguy707070, and welcome.
Gaining 1.5” in length is common. 1.75” in girth is less common. It seems to be genetic whether you gain easily in lenght, girth or both. I got 1” in length from 5min stretch per day in 3 months (see my signature) — I can recommend that you search on “LDP” stretches. I’ve gotten little in girth. But search on posts by Big Girtha, he’s gotten about 2” in girth, the lucky bastard.
Click on “PE Data Site,” then click “View all the data” for inspiration.
It’s impossible for anyone here to predict how your unit will react. If it does respond to PE, your routine should be sufficient for the first 2-3 months. Once you plateau, you can start experimenting with other techniques.
Start: 6.3 x 5.2 (Feb '05)
Now: 7.9 x 5.65 (gain 1.6 x 0.45) - SFL 8.6"
Goal: 8.5 x 6.0 - Currently trying: handclamp squeeze, O-bends. My data - Progress log