Hey there
First of all, huge huge hugs to you. Single parenting is a tough road, and to be completely honest its going to almost do you in at times. I left my son's father over a year ago now, and its been a hard slog, but you know what - it gets easier! And better. So much better!
The DPB is a total sh*tter. People who blather on about single mums on the DPB having it easy are talking out of a hole in their backside. Its barely enough to live on. And some weeks it wasn't enough to live on. But don't give up! Get out there and get some work - working for families is a godsend to me, plus there are accommodation supplements, help with childcare costs and study incentives (depending on what you are planning on studying). You may well find, as I have, that this is really the beginning of a fabulous new life.
Feel free to PM me if you need anything at all.