sister sarah,
Congrats on the purchase! I really like to shoot my 75B...it probably gets the best work out of any of my 9mm handguns!
Regarding getting it ready to shoot. You really do not have to do a thing. Just clear the barrel before you fire. I know, some will say a thorough cleaning and check-over are in order, but I would not waste a minute doing that when I could go to the range, fire 400 rounds, and THEN clean it!
I too use the Wally World Winchester White Box ammo. I can buy just a little cheaper sometimes...$109/1,000 delivered WITH no sales tax.... Century Arms sometimes has this deal.
But honestly, I find it pretty easy to go to Wally's World.
Please give us a range report once you have shot your new gun. We all enjoy hearing the impressions of our fellow shooters!
Please, hang around and become a "regular"!!
Best wishes.
VF