Hello Andy,
An individual must be 16 years old to solo an aircraft, 17 years old to obtain a Private Pilot Certificate, 18 years old to obtain a Commercial Pilot Certificate and 23 years old to obtain an Airline Transport Certificate. FAR Part 121 (major airline regulations) require all pilots to retire at the age of 65.
You need to visit an aviation medical examiner for proper advice. You can use this locator to search the nearest AME in your area. https://www.faa.gov/pilots/amelocator/
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