If you are over 18, you can purchase a firearm directly from a private (non FFL) seller.
Words of advise:
-Prepare yourself for the anti-crowd, though we dont have much issues here in the east with that, it still exists.
-Always be on your best and kindest behavior...we have an image to keep up as we fight the bad vibes induced by the media.
-know when to leave (when you have been asked by the owner of property)
-Dress appropriately....thug attire as well as matrix wanna-be is not good image.
-Do your best to not touch the sidearm as you carry as you might be pegged for "brandishing" if someone has a bad day.
-learn how to proficiently draw from your holster (gun unloaded of course!) in case of need
-understand your piece and how it works. Learn to be comfortable with carrying one in the chamber because when you need it, it is highly unlikely that you will have time to rack the slide.
It might seem overwhelming at first, but it becomes muscle memory and second nature after a little while.
im sure others have their words of advise too!