I think realistically you would be looking to upgrade closer to 12 months down the road than 6.
Just because it does take time from your INDOC, to complete your type rating, get the licencing paperwork done, complete your Line training(3-6 months) and then spend 6 months seeing the operation and some of the places we go to.
But, 12 months goes very quickly at NJ, if you consider you do 3 tours a month, you spent 4 months from INDOC to completion of Line training, that leaves 8 months, which is roughly 24 tours, minus for Leave and a recurrent sim, you are talking about 20 tours...