Help With This Situation?

Hello, I'm 21 years old and in the Air Force and never been in a relationship before. I'm currently a full time college student as well and I'm currently trying to become a fitness influencer as well. I have been at Florida for 2.5 years and I usually do shopping at target. This girl works at target and when I first saw her in drive up (how I get my groceries). She repeatedly kept looking at me while I was in my car with windows up. The second time she came up to my car got the code and put the groceries in the back and when she left she looked back at me (walking from the back) and gave a smile and wave goodbye while my window was up and I waved back. What should I do if I'm interested?
Help With This Situation?
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