Well done on writing your first post here. I hope you will soon see replies from other people who will support you and share ideas with you.
I just want to pick up on one or two points briefly… you are not worthless; you are a valuable human being, who has sadly made some unhelpful choices, but you have started to face up to those and to take responsibility for making changes. I think you have a sense of how your parents and sister might be feeling – these are the normal feelings of people, who don’t want to see you in trouble, but are confused, angry, maybe frightened right now. Try not to let it get you down – you have to work through your feelings and they have to work through theirs. The more they see you actively seeking recovery, the more likely they are to be able to cope with their feelings and perhaps begin to understand how to support you.
You don’t think you would do the same things again – it’s good that you now want to turn from gambling. I would say strongly, though, that it probably won’t be useful to assume that your will-power will just carry you through… do use this support here, including the Support Groups, the Helpline, etc. You may also find there is local help, eg a GA meeting you can attend.
So I wish you well.
Monique