adoption guides as well as forums and Facebook groups for both families who want to adopt and for children to find their birth parents. You might also be interested in reading up on Peruvian culture.
The time and paperwork involved is different for Peruvians living in Peru, those living outside or Peru, foreigners residing legally in Peru, and foreigners not residing in Peru. See MIMDES for information for adopting a Peruvian child. In order to adopt a Peruvian child, your country must have an agreement with Peru. Contact an adoption agency for more information.
One tip to remember is that speaking Spanish will help you greatly. You'll be treated differently than if you speak English all the time, it'll help you assimilate, and you'll be able to communicate easier. If you're looking to learn Spanish, check out Fluenz Spanish, Rosetta Stone, and Synergy Spanish.
The Ultimate Peru List recommends: