You’ve done one of the hardest things already, which is admitting that you need help, and it’s obvious you want things to change. It’s not just the money losses I’ve found, but the shame of the addiction that is hard to deal with. But it’s an addiction that can grab a hold of anyone. Not everyone is strong enough to ask for help.
I highly recommend self excluding, it will help put your mind at ease. I installed ganban on my laptop and phone and it stops me from being able to gamble online, and it’s such a relief to me because it means it’s not even an option, even when I have urges.