Agreed with Eeyore on this.. get AV and you'll be happy with the selection available to you.
As you wait out the time period to get AV you can always go to places that offer rentals. Splatters generally has nooblord you can rent from. You'll get to see test out a few guns at least off him before you decide on something you want. You'll also get to see some guns there too from other people too.
Just remember to show up with ID proving your 18. If you're lucky someone might be there who can AV you too
... Just call me Blue ...