I tried this out to make guest slippers. It took a bit of work through trial and error. The real problem is that thick felt like that is really expensive and the thinner stuff doesn't hold a shape as well
If you want an adorable shirt that you can dress up or down and use for any season, you& love the DIY Lace Insert Button-Down Shirt tutorial. This is the easiest of sewing projects for beginners, and you can sew it with a machine.