Welcome. Glad you found us.
I think SMART Recovery and AA both have online meetings, if there are no meetings in your area. But of course, people get sober without meetings too. You mentioned mental health issues. Do you have access to therapy or medication- some way to treat those issues too?
I feel very desperate when I drink. Sobriety is so much easier (even with the frequent voice of why I should try drinking again). There is still hard stuff to deal with sober, but at least I can work through it when I am sober.
I hope you find the support you need. You still have so much of your life in front of you. You can turn this around.
And getting sober will make a huge difference in your son's life. Do not underestimate your importance in his life. My own life was dramatically improved when my mom started to get sober when I was young- It made a huge difference in my life, even though I would have said that I was not all that close to her then.