Well, if nothing else, this will be a learning experiment for ya.
Me, personally, would have left it whole. Maybe take a small division out for a friend or a trade, but basically left it whole.
the goal (at least mine) is to have large plants that put out many flowers in a single bloom. Repotting is only to be done to replenish decaying growing medium, or to move into a larger pot.
As for the Home Depot growing medium, meh... I would rather grow in coconut husk and broken clay pot bits before I use that stuff. I use a mix made by Broward Orchid Supply that consists og Leca balls, charcoal, coconut husk chunks, pearlite (sp?), and some pine bark (minimal on that last). Pretty much more of the former to last in ratios.
Good luck and don't fret too much if you lose a few. I'm still killing some. I've only been doing it for about 18 months myself.
This is from about 6 months ago...
And I think I've added about 30 more since then...lol