Hi Iwanttostopgambling and welcome to the forum.
I was like you and had said that I was going to stop many, many times in the past. When it really was “for real” why should my family believe me? Like you wife they had heard it all before. In the end it wasn’t my words and promises that counted, it was my actions that they took notice of.
You have listed a lot of good actions there already. Well done on self excluding from your online accounts – maybe think about installing a blocker for your PC as well. That would stop you opening any other accounts.
I see that one of your proposed actions is to go home right from work, is that a time you used to gamble? I don’t know what your job is but if you don’t need to carry cash as part of your job then don’t have any in your pocket when you leave home in the mornings, just enough for lunch and a drink – that way you can’t gamble on the way home no matter how tempted.
Keep posting and let us know how you get on as you implement your plans.