Finding Clients When Your Niche Involves Hidden Guilt/Shame

I know that typically as a coach you might look for clients in Facebook groups, networking events, etc….but what if the problem you are addressing involves adult children of alcoholics who worry/have anxiety about over-drinking and fear becoming an alcoholic. I believe a lot of my potential clients don’t appear to have a drinking problem, but they have anxiety about their drinking and so it’s a pretty “hidden” problem for them. I’m finishing my program for these people who want to have a healthy/worry-free relationship with alcohol and have a family history of alcoholism. I know that many people search online for help with alcohol problems but I’m not sure how to approach people directly. What other ways can I try other than putting content out and having people find me (organically or paid traffic)?