A hole has developed on the inside arm of one of my cashmere sweaters. It is quite small, about 1/4" x 1/16". I see various suggestions online about how to repair holes, but it's quite overwhelming for this sewing novice! (I'm not very good at anything requiring sewing. I can barely sew a button on.) The cashmere is cheap--I got it for about $35 last season--and it is already pilling, but I do like the shape and color of the sweater and would like to save it if it's not too expensive. Any ideas on the best way to fix the hole?