You wont have to OC at a store like that with a CPL, but you have the option once you have a CPL. A bar is a different story, you can only OC with a CPL there, but let's get you up to speed on the basics first.
Transport properly, carry a digital voice recorder, and know the gun free zones like you know your back yard.
Start saving your pennies. I just picked up a brand new M&P and had Trijicon sights installed, and I am unemployed. Took me less than 5 months. You can do it.