Mental health blogs take a great deal of monitoring, editing, and content update. There are many on the web. You should Google what already is out there and decide how you can make yours unique. I had a blog for a long time. When I started my first book, I just ran out of time to maintain it. Also, setting up a blog requires design skills. I didn't have those skills so I had to hire someone to design the blog for me. My blog got good feedback because my focus was on ways to improve relationships with our psychiatrists and therapists. It was problem solving focused. There was a lot of interest so it kept the blog going. I still get views even though I haven't updated content in a couple of years. If you get a blog topic people really engage with, it can live on if you can't always maintain it.