Gregory, complete requirements and exemptions for purchasing a handgun in Maryland are here : --- https://mdsp.maryland.gov/Organization/Pages/CriminalInvestigationBureau/LicensingDivision/Firearms/HandgunQualificationLicense.aspx

It will be best to go to your local FFL and do what’s required in your state/ordinance. It was my pleasure to assist you.

In order to purchase a handgun in Maryland as of October 1, 2013, the buyer must possess a valid Handgun Qualification License (HQL), unless otherwise exempt. Exemptions apply to the following people:
Licensed firearms manufacturers.
Active law enforcement officers or a person retired in good standing from a law enforcement agency of the United States (Federal Law Enforcement), the State, or a local law enforcement agency of the State.
Active or retired members of the United States Armed Forces or National Guard that possess a valid military identification card.
A person purchasing, renting, or receiving an antique, curio, or relic as defined in federal law.
Maryland licensed firearms dealers (sole proprietors). heritagetrainingcenter.com/retail/how-to-purchase-a-handgun