Hi and welcome to SR.
Do you really think that smoking pot will help you to quit alcohol? I think if you are honest with yourself you would probably admit that at some point, if you keep smoking, you will be more likely to drink alcohol than if you were completely clean and sober.
This disease of alcoholism (addicition) is a big liar. It will tell you anything so you keep drinking/using.
My experience of more than one addiction is that one will use the other to get me using both. Be wary of this.
Good luck in your journey of recovery. I use the 12 Steps of AA for recovery. Have you considered meetings?