Help in sales career

Hello, I’m new here and would like some help. Im 23, and Ive finished all my pre-req classes before applying to nursing school. But a branch manager of an electrical supply company wants me to work in sales at his place. With no prior experience I’d have to start in the warehouse, kind of a bummer but makes sense. My only worry is that I’m being roped into being just a body in the warehouse, I want to do actual sales eventually but not waste years of my life with nothing to show for. Because Ik it’s what I’d be good at. I’m currently an experienced bartender with over 7 years in customer service, and have built close relationships with numerous contracting companies in my city. My thoughts are that these relationships can transfer to this job as well. Please, any tips and or thoughts would helps so much… thanks!