I've tried and failed to meditate because of the chatter. From what I understand it's like a muscle that needs to be worked on... At first it's all over the place but you can find peace through repeated sessions.

This is all theory from me though because I gave up trying after a couple of attempts. Don't feel worse because of it though, yoga can do good for the body and mind as well while not demanding focus on nothing.

How old are you? (So I can relate my advice to you)