Cool, Clean up is easy. Use some Dawn and some 0000 steel wool. Personally, I use SOS pads and a bit of Dawn. You can buy a regular 18 charcaol grate at almost any store that sells Weber parts.
Ace, Home Depot, Lowes, etc. Brian or AKA Zavod can definitely get you a nice handle for it.
Be advised, with no bottom vents, you may have issues with air flow. Personally, I have not.
I just let my coals get hot before I drop the lid on. You can always leave the top lid slightly askew.
Enjoy! AJ