Ok, I found your recipe:
2 gal. Apple cider (natural, obviously)
2 cups dark brown sugar
2 oz. Peach extract
1/2 packet Lalvin K1-1115 wine yeast
Just kind of heated it up a bit, mixed everything together and pitched at around 80 (high as hell I know, but it wouldnt cool quickly enough for my liking and behaved differently than beers I've brewed. It is an experiment and it's currently in my basement at around 55f.
So, my advice is...experiment! Obviously, the longer you let the stuff age the better it will taste. If you are fermenting at 55f, that's lower than normal (68f) so it might take a few weeks or a month longer than at 68.
Racking to secondary is more for clarity than aging. It will age the same in bottles or secondary. So that one is up to you.
I would just let it go in the primary for a few months until fermentation stops and it clears up and then go straight to bottling.
To backsweeten, you add non fermentable sugars(splenda, xylitol, lactose, ect) at the time of bottling. Again, this is up to you, as your cider might not need it due to the yeast or peach extract. Time can also help this one a lot, because the number one complaint about cider is that it tastes watery, hoochy, and not very apple flavored in the beginning, but as time goes on the apple taste comes back and the hot alcohol flavor mellows.
Hope this helps!