Welcome here to this place which is full of gentle and understanding people. As sadly many will have been in an abusive relationship you will most certainly be understood.
Can I ask -excluding your ex's activities for the moment - what are the most urgent things you think need doing?
Ensuring you have proper medical support, both for this and your ongoing mental condition? Fixing your tax, supporting you dad, a better paying job?
Anyone that manages to break out of an abusive relationship is to be admired, they may feel within themselves they have made big mistakes, however in fact it is all down to the other party -the abuser, who leaves the partner in a terrible condition -as you have found out. So well done!
A 17 or slightly older daughter can easily be influenced and this may even last for a while, particularly as she may have a councilor who acts on a fantasy version of events that she supplies.
I would suggest you ring
Relationships Australia (1300 364 277) about their post-separation service and a free
financial counseling service such as Anglicare (1300 111 278 during business hours may have your local number) over your current financial situation.
Maybe nothing will be fixed quickly, but there is hope. You know you are capable of earning a decent wage. You know you are strong enough to take out an AVO, even if circumstances did not let you see it right the way though. Wise enough to ask for help here.
Leaving the house, and letting your ex access your daughter would seem to be a major hurdle for you. Perhaps letting that one sort itself out in the short term and dealing with it later might be an alternative -what do you think?
If you feel overwhelmed,I'd suggest giving the Suicide Call Back Service (1300 659 467) a call. They are very sensible and professional, they can be a comfort.
Life does throw up horrible situations, and you have more than your fair share, getting someone on your side is a start.
Please come back and talk more