You got to read the experts who have posted here. Read as much as you can. Time is your friend if you spend most it on PE. The price will be dear, that means you’re not going to confuse comfort with happiness. Instead, you’re gonna pull out an 8 inch cock one day. For experts, start with Bib, Sparkyx, sta-cool, luvdadus, hell, read DLD. I hate to name check but these guys have put in the time. Not everything they say will work for you, but your knowledge and possible routines will open up.
Two inches from manual? Not credibly reported anywhere. No big deal, just learn about hanging, pumping, whatever you need to do. Once you get comfortably out of the six inch range you’ll be hooked. You’re not talking about an EQ bump and a nice little half inch gain. You’re aiming for the fences, I like that. I swear I could pass for 7 length now after fifteen years at 5.9 or whatever. That is eighteen months of total hardcore dedication, and I JUST started to hang. It’s not going to be easy, but my horse cock will look great on me.
Spend about seventy five hours reading on this forum. And by all means start conditioning your dick for the long haul. That’s a start, fellow enlarger.