Here is the information you need in English. > http://www.expatperu.com/requirements-f ... jeria.html
It tells you the forms you need, where to go, what to take.
I'd have a hard time trusting an immigrations official who said I had to return to the US every year for three years, since that is simply not true.
Instead, if you aren't comfortable doing the process on your own, you can hire someone to do all the work for you for a fee. It still costs something, but you'll get it done legally.