You can try and upgrade when you hit 1500, but good luck. Odds are, an FO who's senior thats been there longer will upgrade, and you'll get bumped or displaced. Junior base is Billings, Parkersburg, Du Bois, and Bradford. Flying schedule is reserve for at least a few months, with 11 days off a month and a 75 hour guaranteed pay. Billings is 3 or 4 day trips. Northeast bases are all day trips. Hope that answers your questions.