Are you knitting on straight needles? That maybe the reason that you knitting is wraping, because there are too many stitches to fit nicely on the needle. If you switch to a circular needle and keep knitting in the same way, the stitches will have more space to spread on the needla and on the cable.
It's hard to explain about starting a new row, you just knit the first stitch like every other stitch. Amy has a video here
of making a small project. There you can see how to start a new row.