If you have it, it's doable--it might take a bit of trial and error, but that's a part of the fun, I think! And even if you don't have it now, you may soon enough and the offer still stands.
Oh, the difference entirely depends on who you ask! At its core, it's about the origin of magic. Sorcerers are born with magic, wizards learn it--there are some exceptions, some spells that can double dip, some enchanted items that allow for other magics, but as a sweeping generalization, that's the difference. Darling, when all of this has blown over, we'll make plans to meet, we'll chat magic, stones, sorcery, all of that, hm?