With Supergirl #9, looks like DC is getting away from the Twilight Zone/What If/Earth Angel/"Who the Heck understands it, and who the hell cares?" rendition of Kara and is starting to go back to the basics -- a superpowered Kryptonian female teenager, albeit with a little more moxie than the silver-aged Kara.
Good jumping on point for new readers, IMO, with this issue. Oh, and a nice panel of her lifting a delivery truck one handed!
LF