The razor burn could be due to the blade angle being too large. Try to keep it around two spine-widths from your face and maybe even less so on your neck and see if that improves things some. Another source of razor burn could be from putting too much pressure on the blade. Don't worry, it will get better the more you shave, it just takes time.

I'd consider getting a pasted strop soon though. You're not gonna get more than about 10-15 shaves (on average) before the edge will need to be touched up.