If you read through the threads in this forum, you will see that there is plenty here to guide you.
n1) Ban yourself from places where you play both on-line and off.
n2) Lose access to money, get your fiance to handle your finances for you (you don’t have to say why you need this right now – but it does help to be honest!)
n3) Lose access to the time to gamble. Find something else, another passion but not one that will cause problems (like alcohol) to spend your time on.
n4) Get good support for yourself. Maybe try counselling if it is available in your country, or zoom meetings for gamblers who wish to stop – https://gamblersinrecovery.com or talk to a medic.
nYou can also visit the groups on this site. There are facilitated groups for new people on Mondays and Thursdays so you know someone else will be there. Times are shown on the yellow tab „support groups.“ I wish you well.