Those aren’t poor questions.
Some things will change from year to year. But in general, Italy, Carson, and Hawaii go out first. Polk and Irwin last. Everything else in between.
Some love the idea of airborne and want the 82nd (Ft Bragg). Others want the 101st. Some want a mech unit.
Some branches such as aviation chose later, but normally you get the same thought process and preferences.
I’ve been at many posts. Korea, Ft Rucker, Bragg, HAAF (Savanah), Bliss, Campbell, Gillem (Atlanta) as well as other locations. Frankly, we loved El Paso (Ft Bliss) and Savanah the most as far as locations. We loved our units at Bragg though we weren’t thrilled with the location.
But much depends. You can be in a crummy location as a 2LT but be in a great company and battalion and love it. You can be in paradise but a crummy company and battalion and hate every minute.
All you can do is your best, make your selection based on your desires and what is left, and drive on from there.
As for how long, normally you can count on 2-4 years on station as a commissioned officer. Some places people tend to “homestead”, such as Bragg. The longest we spent in one location was 5 years. Fifteen houses and counting. I think. I’ve lost track.