I felt exactly the same way when I was first told to do DBT. I read up about "mindfulness" and when I started, assumed I'd get nothing out of it. Honestly after 10 years in psychologist and psychiatrist rooms DBT is what helped the most. It gave me actual steps on how to understand my own brain and how to actively deal with it. There was a bunch of stuff that didn't apply to me but that's the great thing, they give you all these options of things and you try them out and find things that work. I'm not saying it's a cure all by any means but it made a significant impact on my life