How to find clients and recurring online presence

I want to start a coaching business so I can leave my current job (which I enjoy very much, but I am excited about coaching).

I am not active on social media. In fact, I’m not that familiar with it. How do I find clients if I don’t use social media? Especially during this pandemic when I’m not out seeing many people (because of my age). Also, I don’t have a large circle of friends and I cannot promote my coaching practice at my current workplace.

Yes, I know this is my brain giving me roadblocks. And, if I had the answer, I really don’t know what it would be. It seems to me it has to be some sort of online advertising, but do I need to have recurring online posts?