I do some meditation almost every day.
I started off with two minutes at a time, setting my timer. Now I do 15 minutes, and are planning on keeping it that long.
I'm not sure what type I am doing, or how good I am but I try my best to do what they say I should do.
It works for me. But it is not something you should do to relax. You should do it before you get upset while your mind is still in a good state.
It is one of those things where the improvement are incremental. Do not expect any miracles, but after a few months you will feel the benefits.