Brokers go through specific education and on-the-job training to earn their qualifications.
In particular, look for a broker who has earned their Qualified Practising Insurance Broker (QPIB) or Certified Insurance Professional (CIP) status. If in doubt, ask. Brokers will be happy to let you know of their qualifications and explain what it takes to attain them.
Brokers are required to show evidence of continued professional development each year to maintain their qualifications.