Invite friends/family to the range with you. Show them that it is a safe, fun, responsible, and empowering activity. I have brought MANY people to the range with me and I have never heard from any of them that they didn't enjoy themselves. Not everyone I take will become a gun owner, but there are people (liberals) who have had their minds changed about the gun community and gun laws after I have taken them out.
combine ear plugs with earmuffs if the noise is still to loud for your ears with just earmuffs.