If you're looking for cool shopping spots check out South Congress! It's a great place to get the Austin experience and cool gifts. Check out the website below for some details. https://www.afar.com/travel-tips/shopping-the-boutiques-of-south-congress
If you're looking for some night life fun then Rainy Street is a great place to go. They have super cool bars and tend to have a more "grown up" crowd. Check out the link below for more information. https://www.austintexas.org/things-to-do/entertainment-districts/rainey-street/