Welcome.Glad you're getting everything straightened out!
Once you're at the point you're going to buy new fish, make sure you know how many they need in a group, as well as how big they get. I would say your best bet to to search for 10 gallon stocking threads on here, to get an idea, then start a new thread if you have questions.
And I'm sorry the big box store near you seems to not be helpful. for the record, they're NOT all like that. The one near me has great employees, and healthy fish. I've bought fish and inverts from them with no problem.
Yeah, some of the employees at the retail store are nice. I usually don't have what I need when I come in and meet a nice employee, so I go home and come back a few days later only to have some really jerky employee be the one working that day.
I'm going to start a thread later today.