Hey Smokey, I agree with Big B and will add some recommendations. A good one-week or more (8-11 days, typically) with relatively easy logistics and lots of bang for the buck is Mt. Rainier's Wonderland trail. It's just under 100 miles, is designed as a loop, nice campsites (privies at each one), and so on (just google "Wonderland Trail" &/or YouTube). Another nicely designed loop (easy logistics) that's a bit longer one, at 165 miles is the Tahoe Rim Trail. You will gain valuable experience by gradually increasing the length of the trip. You will learn how to pace yourself, adapt over time, how to deal with resupplies, and so on.
_trek-or_