I take the "rolls" from batting. JoAnns will give them to you. Lay out the backing and roll it up and then the top. Anchor the backing at the top to the table or floor and unroll about 12", glue spray, place backing and hand press, spray the batting, then put on top. Now, hand baste every 10" or sew.
continue on until done. (Hope this makes since) This will stay together for years until you get ready to quilt. Good Luck.