When I started knitting, I made so many bags, too many to count. Nearly all the bags I have made in the past have had parts that needed to be sewn together. i came with this design that requires little to no sewing at all, it is knitted from the bottom-up.
This pattern is easy to follow, and I recommend it for someone who wants to learn to knit in the round. The pattern is available directly on this website, on Ravelry and Craftsy.
I used worsted weight yarn but any weight yarn can be used for this bag.