You don't need a mechanic unless it's a Q and A session. All of the basics are covered in government approved publications. All anyone needs is a desire to learn. Most of the common items for small aircraft are covered in the AC43.13. Many of the 330,000 A&Ps have no formal training to begin with. Very few ever work the industry, so an A&P as a credential is meaningless by itself. I doubt that any experienced working mechanic will be willing to give away their trade but there are plenty of armchair experts around.