I feel that way too. I am twice your age and I now realise what I could have been doing with all the time spent in gambling places chasing losses mainly.
Good that you have sought out therapy and recovery meetings. The other things you can be doing are – banning / barring yourself from places where you may be tempted to gamble, and limiting your finances so you don’t have the means gamble. If you have a trusted friend or loved one – then hand over your finances completely until you feel strong enough. But be aware this could be several months or even years. I wish you well.