Well, I'm old enough to be your Mom, but here goes
...First, if you haven't done so, visit the area with some appointments with real estate agents (prefably young) who handle rentals. You can tell them, if your move proves successful, you will eventually be buying. Talk to them about living in Charleston as a young and single person. Talk to young people in stores, restaurants, etc. about the same thing to get a feel. Do a search to find Charleston real estate agents and go from there.
Hope this helps.