While you may not share Mexican values and customs, a good guest should be aware of them. Don't be daunted. It can take years in any environment to become aware of the subtleties that govern our behavior. Spanish, it is important to master the language to some extent as it will also provide you with vital cultural cues. Men often give each other solid handshakes.
Women kiss on the cheeks when they meet.
Everyone indulges children in Mexico. Mexican culture is founded on church and family. Grandparents mingle with young marrieds, teens play with toddlers, and everyone indulges children.