Saw has a built-in sliding carriage for moving pavers past the blade. Recirculating water keeps blade cool and lubricated.
Tamp entire outside edge first, then circle in.
Repeat with more dry sand in a few days. Grass will root through the open spaces in flexible edging to anchor it in place. This project scores a 9.9 in sweat equity. You'll be amazed at the amount of dirt you remove, even with the smallest patio. Compacted earth, once dug up and tossed, tends to double its previous size.