You'll be fine! There are many ways to do the bottom of a felted bag. The first ones that I made I knit the "tube" and then sewed the bottom seam. If you want the bottom to "sit" then after you sew the seam, you can sew down "triangles" inside the purse, on both sides of the seam, as wide as you'd like it to be. Clear as mud, I know. Somebody help me out explaining that.