Make sure you have hoop sizes that will produce larger designs--some machines only come with a 4x4 hoop and that is not large enough--5x7 is very popular but get a machine that can handle larger hoops. Also, a machine that will cut jump stitches is very convenient. Learn how and when to use the stabilizers--sometimes you have to float another piece under your embroidery to produce good stitch outs. The various machine manufacturers want to sell you their software but there are several that will do the same thing and are a lot cheaper. A lot of free designs are by beginning digitizers. Over time you will learn who are the better digitizers.