Welcome to this board. The quilters on here are wonderful and a marvelous source of information. I use my ironing board, raised to its highest position and with a sheet of plywood over it, about 4 x 6, to spread my backing, and clamping it, then add the batting, clamp it, and finally, the top and clamp it. You should have a smooth top and you can stand up to baste it if you choose to pin baste it. (My knees won't let me get on the floor anymore.) Have fun! Your first quilt looks great, by the way.