Are you stuck? Are you wondering where to start? Well one good place would be to ask your questions on the research@nuestrosranchos.org list. We might not be able to help but we'll try.
If you are just starting out in genealogy then you need to familiarize yourself with your local Family History Center. Your local FHC is part of the LDS church and is an absolute goldmine of information for Mexican Genealogy and other locations around the world. Go to www.familysearch.org to find your closest location with the best hours to fit your schedule: go to the site and click on "Library" and "Family History Centers" to find your location. Give them a call and pay them a visit. Ask questions about how the center works.