Hi Sarah ! Welcome and well done on facing up to things .
I think you should be in the other forum tho!
My tips would be
1 . stay accountable to your mum about ur money
Maybe even get her to handle your account for awhile and monitor what u spend
2. Treat yourself to nice things even while u pay off debts -things which remind you that money has other purposes and that reward u for not gambling .
3. Don’t look back . What is gone is gone and is never coming back. Eyes firmly looking forward .
Hope this helps