There are plenty of modern apartments off Broadway near highway 35 and 281 on the other side of the Pearl District. This area is growing so much. New apartments being built, new bars and breweries opening up too. New buildings of business moving down there.
My cousin lives in one of the apartments off the Riverwalk on Broadway. A perfect area to go for a walk, run or biking. Some nice eye candy too. That north side of the Riverwalk is less crowded with tourist, more locals there. The museum of art is in that area and they have events.
The Pearl area is on the other side. You can walk on the Riverwalk, or take a quick Uber or scooter there. They have a food hall, shops, restaurants, events, and a farmers market there every weekend.
Not that far away is the St. Mary Strip. You can take an short Uber ride over there. The strip has plenty of bars. A good bar hopping area where you can walk. You will see more locals here.
I went off the basis off your age if that is what you like. My cousin apartment has become the meeting destination where we everyone meets up and we walk or Uber to a bar(s).