I cannot recommend Costco’s auto program [1] enough for a buyer with your profile. Dealers with whom Costco works have been vetted by the Costco machine. Prices are pre-arranged based on your zip code/location, and they have a live help number if you need to start with, “which car should I get”.

I know three people who have bought a car through that program and they have nothing but praise for the experience.

1. https://www.costcoauto.com/