You will really enjoy it. What to load on it ? Every caliber you own, what else ? I got a nice deal on mine right here on TFL. I don't remember what I paid for it, but I got the press with all the options and 3-4 complete caliber conversions including powder measures and the whole nine yeads. I have been reloading for years, but this was a significant step forward for my pistol ammo. I personally don't load rifle ammo on mine, but that is mainly because I don't shoot all that much rifle ammo and what I do shoot is easily loaded on one of my other presses. I think you got an unbelievable deal, I would have owned two if that deal was presented to me.
You know the rest. In the books you have read
How the British Regulars fired and fled,
How the farmers gave them ball for ball,
From behind each fence and farmyard wall,
Chasing the redcoats down the lane,
Then crossing the fields to emerge again
Under the trees at the turn of the road,
And only pausing to fire and load.