I'm usually very uncomfortable in situations where I think it's obvious that I have no idea what's going on. I don't like making a fool of myself.
When my doctor first suggested e-cigs to me, there weren't any grocery stores in the area that sold stuff like Blu, etc. The only way I knew you could get those was over the internet, and I wasn't about to do that because they all wanted your credit card information and then they'd "automatically" send you refills. Um, no. I'm sorry.
Fortunately, I had noticed a new store on on of the main drags in town called, "VapeOn." It was an e-cigarette store according to their sign. So I went in. And saw this counter with what seemed like a dazzling array of "stuff" (I had no idea what any of it was at the time.)
It's owned by two women. One is normally in the back, making e-juice and doing whatever else she does back there. The other is always out in the front helping customers. (If they get busy, the one in the back will come out and work the counter, too.)
Doris, the one that usually is out front, seeing that I had no idea about any of this, was terrifically helpful. She helped me pick out what I needed for a basic set-up. Not the absolutely cheapest stuff in the store, but not the most expensive. I was just learning about this, so I didn't really need the Cadillac of vape-gear. She sold me an Itaste VV and a Smoktech Pyrex Aro II. Then she took me back to their "tasting bar" so I could try different e-juices while she also explained how my set-up worked. She never, at any time, gave me the impression that she thought I was dense because I didn't know anything about vaping. And she told me (as well as other first-time customers I've seen since then) that if I had any problems or questions, to just stop by and ask.
I've never seen them try any high-pressure sales techniques. You tell them what you want out of your equipment and they'll make suggestions. But they won't try to sell a beginner the most expensive stuff.
I've been quite comfortable going in there ever since.