Welcome Max, here you will find all that you need info wise to get stsrted with getting bigger 😀
Unless you know for a fact they are that big, most guys exagerate their size, don't take it on face value, but then again they could be, it doesn't matter either way, what matters is what you have to work with. Check out the newbie section of this forum and read over DLD's
newbie routine as well as the other stickied threads in there, great place to get started, if once you have read up on a bit of info & are aquainted with what is involved and still have questions, feel free to ask.