Could I add cream cheese instead of cream?

The possibilities are endless! You could try football, ultimate frisbee, volleyball, track, soccer, tennis, or any other activity that you take an interest in.

You can just use the Nutella. I eat plain Nutella with apples all the time, it's delicious.

Yes, it really doesn't matter.

Maybe you forgot to put the cream cheese into the refrigerator overnight. If you didn't do that, and the cream cheese still is not hard, freeze until it becomes solid.

You can use a tarp or any plastic sheeting, just be sure the material is strong and won't tear.

Yes, you can. You can use milk or other types of creamer.

Beat the cream cheese on a low speed and then slowly go up to the highest speed. Then, you can thin the cream cheese if desired.

Yes, whipping the cream cheese will aerate it, causing it to be lighter and easier to spread.

No, it will not thicken once it's melted or softened. It gets creamy because the main ingredient is milk.

Margherita is a type of pizza derived from a proper name, so it should be capitalized. It would also be capitalized If it were considered a brand name.