What is the next step on my quilt top?

Your layout is great. You need to sew them by rows, either up or down. When all rows are done take by rows and sew them together. When quilting always use a 1/4 inch seam. Your squares will end up being 5 1/2 inches.(when making a quilt usually you will add the seam allowance in so your squares would be 6 1/2 before sewing them). After you have finished sewing all the rows together take one color of remaining material and make a 2 1/2 inch border. You will sew pieces of that material together to measure the length and width of the top.If you do not have any material left to do this I would suggest that you go to a fabric store with a small scrap piece and find material in a solid color to match one color in the print. You will need about 1/2 yard. That will finish the top off. For batting I use warm and natural or warm and white. It is 100 percent cotton and very light. I use this for wall hangings,and small quilts. There are many types of batting out there and all will work fine. If you are wanting a batting to be light then go with 1/4 inch loft. Warm and natural is 1/4 inch. Now when quilting this together make sure your machine is able to quilt what we call a sandwich(the top,batting and backing). I have a sewing machine but it is not equip to do machine quilting. So I quilt by hand. Your sewing machine should have a separate foot for quilting, and stitches that you can set to do the quilting. You also need to have the right needle for this. I use an embroidery needle or in betweens in my machine to sew with. That is because I don't want holes in the material. (some needles break the thread of the material and leave tiny holes that later help in the ware of the blanket). this goes for both sewing the pieces together and quilting. Lastly you never said what size of quilt you are making. You need to know that so you can buy the correct batting. Batting comes in several sizes. So if you are making a lap quilt say 54 x 54 or 66 x 66 you should by a twin size package of batting. Warm and natural does come by the yard but you still need to know how much. If you want a larger size then you can by packages that say twin,full,queen,etc. Also If you do not have material for the backing then when you buy the material for the small border buy enough for the backing. The backing should be at least 6 inches more all around to allow for the quilting of the quilt. Good Luck