Welcome "Gulf Coast", nice hat! Destin Florida, tough location
!
Most members without access to raw milk including myself quite happily use store bought cow's milk for making cheese. Another idea for you is to make Light Cream Cheese, sold in stores in US as
American style Neufchatel. It takes two days to make and is a lactic acid coagulated cheese that sometimes uses just a little rennet. If you are using store bought pasteurized milk then you need a low temp (mesophilic) starter culture to goose the milk as it is largely biologically dead. I see from your OP that you didn't buy any in which case you can use store bought buttermilk, but
be sure to age it first before adding to milk to up it's microorganism count.
On cow's cream, I'm same as you, can only find highly biologically dead UP cream in stores, thus I don't make much Cream Cheese or double or triple cream cheeses, that said, full fat/whole cow's milk makes a high enough fat content cheese for me anyway
.
Have fun!