since you are practicing, try what ever is on sale- or you have a coupon for & make yourself notes about how you like the different ones or don't like them & the why's...then when you are ready to quilt big special quilts you will know which batting you like to work with- what you have the best luck with. be sure & read the packaging -- it will tell you how close you need to quilt- some batting needs to be quilted every 2"-4" some allow up to 10" between quilting lines- 2" quilting is pretty dense- 10" quilting allows pretty open-easy designs- follow the recommendations so the batting does not pull apart make empty spaces & balled up clumps of batting when the quilt is laundered or with use. a batting like warm & natural has scrim (a net like material that the fibers are punched into making it a very stable batting - do you have scraps left over from your table runner/placemats project? scraps are great to practice on- and you can butt them up- to each other & stitch a wide zigzag to join them & make them bigger. many of us piece batting even for big quilts since it is common to have long pieces left over after quilting a quilt. there is also a fusible tape that can be used to join batting - but a zigzag is pretty easy (& doesn't cost more than a little thread