Do I need to hire miners if I don't know how to mine?
Mining and verification are different. Miners verify blocks, and verify what they're mining on before they mine it. Users also verify blocks, but do not mine them.

Mining and verification solve different problems. Verification makes sure that a transaction doesn't spend more than a person has. In this context, verification doesn't mean looking at official documents. Mining is used to determine what order two transactions happened in.