Ken,
It all depends. When I checked into the wing, my ground school class started in a week and a half. When some of the May 04 grads got here in late November, they didn't start until mid-January. Seeing as there is a stash that's been in my squadron for a couple of weeks, my guess is near a month.
Workload, not as hard in ground school. It's a week's worth of systems (remembering it all the way through primary is a plus, since most of the brief items in the beginning are systems related), a couple days of metro (easy), and I think that's it?
Work your checklists on the hangar birds (can be found in maintenance, just ask) and look at EP's, as your first 5 sims are EP based.
Workload flying? It all depends on how fast you can wrap your brain around the concepts
Good Luck.