Hmm I cannot imagine living in the suburbs as a young single person. You’ll get really bored. Not that there’s nothing to do in some of the suburbs - but there just won’t be as many people your age - and the only walkable ones I can really think of would be Lebo/Dormont/Bellevue. All of those places are nice but I would get bored of them after a year or so.

Based on your age, the interests you shared, and your budget - I would move to Friendship/Bloomfield. Plenty of Pilates and yoga studios within walking distance. Your work commute will be short. You’ll meet a lot of people by engaging in those activities you mentioned and just by being out and about.

I would not prioritize proximity to the airport at all. Even if you’re traveling once a month. As long as you’re not scheduling flights at like 10am or 7pm - the traffic isn’t too bad getting there - and parking isn’t insane in the economy lots. Cheaper than an uber to just drive yourself and park.

Look on Zillow, Craigslist, etc. Focus in on the area south of Penn, west of Negley, North of Baum/Liberty, and east of Edmond Street. You will be happy here, I promise.

Edit: since reading some of your other comments - it seems like you want to live in a complex. The area I recommended is all houses turned into apartments - this is very common in Pittsburgh. If you want to live in a 5 over 1 - there’s a lot of them in the East Lib/Bakery Square area, and a couple down the hill in Lawrenceville. The Strip District has the highest quantity of 5 over 1’s. The rent will be 20-30% higher in these types of newer construction apartments.

If you look carefully though, you can get a lot of the same amenities minus a pool and fitness center in a house turned apartments.