I have made paneer and 'ricotta (sort of farmhouse cheese) but I have yet to attempt mozz, but in my reading so far it looks like you are much better off with unhomogenized milk, as long as it's not ultra-pasteurized it will be fine. The cheese book I have says that if all you can find is homogenized milk, you are better off buying skim milk and cream and mixing them together.
the salt, as long as it's not iodized I don't think it matters, although I would think pickling salt would disolved faster, no idea if that is desirable or not though.
keep us updated with your progress.