I'm looking into trying to get DBT therapy but what makes it different?

I read a post about how it helped someone control their behaviours and I'm sitting here like I can do that on my own. I already taught myself how.

But it doesn't fix the overwhelming emotions, the feelings of emptiness.

So if DBT is gonna be round 2 of what I taught myself what makes it different? I'm scared of leaving treatment and still struggling with my emotions and thoughts. Like controlling your behaviour doesn't stop the thoughts. I can sit in place for hours wanting to text someone without doing it. But I'm there a mess about it.

I need help making an educated choice here. Idk anything about DBT other than it's about controlling your behaviour.