Where are you located--city, state/province, country?  Mindat is a worldwide site, and sometimes answers vary according to where a question is coming from.

If you are in the U.S., one place to start is https://www.amfed.org/club.htm, which shows a directory of clubs that belong to the American Federation of Mineralogical Societies.  Your public library might also be able to help you locate a club nearby.

Most clubs welcome visitors to their meetings so you can get acquainted and see whether you want to become a member.  Most also sponsor field trips to collecting areas that are off limits to the general public.  Participation in those trips usually requires formal membership in the club since the club has to carry liability insurance to protect property owners in case someone is injured during a field trip.