Advice

I agree with everything Otis said. Put down a concrete Pad. Save the pavers for your outdoor kitchen..

Yes don't forget the anchors for the shed.. One good blow and the shed will be your neighbors..

The pad will be cheaper for sure.
I have laid around 2,000 pavers aroound my house, most on a walkway that is "Y" shape going to my shed. My mistake was that assuming our hard clay ground would be enough to bypass the gravel sub-base. In hindsight I should have laid that gravel base, then sand, then the pavers. I had to redo a section last year because of this.
For your shed, if you go with 4" floor you will need 1.3 yards of concrete. Most yards will only deliver 2 or 3 yards at a minimum price so you may want to make the pad a little bigger (since you will pay for it anyway) and have a little extra room for storage around one side of the shed. If you can make the forms the concrete is not hard to do. A good slick finish will make for easy clean out. Pour your crete and float it, instead or renting a float you can make your own with a 10' 2x4 and attach a 3' 2x6 to act as the float. This will work fine to push the gravel down. Let it set up a little and insert your 4" bolts around the perimeter for your building anchors. Once the crete starts setting up get you a piece of plywood to stand on and you can start finishing the crete to the finish you want. It is not hard work and it is not hard to mess up and save you some money. Also you may want to put the slab on a slight angle in case you want to wash out so that any water runs out the building vs standing in the back corner. Hope this helps.