Paul, the 8" wheel is just fine for learning hollow grinds - the curve made by the wheel is smaller, and a tad easier to hold the blade in place - or it is for me anyway. I think using a rest for your hands still qualifies as "free hand" grinding. You didn't use a jig, you used your hands {g}
That curly maple will work just fine, but might need a finish other than just polishing and wax. I'll let other folks chime in on this, if sanding to a really fine grit (1500 to 2000?) will be sufficient for a nice finish, or if it will need something in addition, tru-oil, etc.
Ken H>