Portland is a city of great neighborhoods, more walkable than many cities in the U.S. Neighborhoods, for example: https://www.travelportland.com/neighborhoods/
There’s better public transit in the region than in most U.S. cities. (Nothing as great as in many other countries, though.)
The Max — light rail — has an airport station, so you can get to downtown Portland and other areas. Just be careful, because there can be sketchy riders, especially because there’s a free ride zone downtown. No need to be paranoid. Just stay contextually aware, because like in various U.S. cities, some people have drug and/or mental illness problems. MAX Light Rail Service
Portland has the best food truck culture in the U.S. You can search online for lots of reviews, recommendations and social media references. Food trucks allow many people to offer different cuisines and treats with lower overhead, so there’s greater experimentation and entrepreneurship. Plus, if you’re sitting outdoors, you can bring pets.
This is an adorably cute mother and son team whose food truck and restaurant reviews I enjoy for the Portland area:
Portland also is within reasonable driving distance to beaches, forests, skiing, wineries and much more. And it’s about three hours driving wise from the Seattle area, depending on traffic.