Wha t I was woundering is I have mountain bike and I wanted to know is when your brakes are loose

When your brakes on your bike is loose the one you press to stop your bike that's actuallly loose. I want to tighten it up and my bike has hydrolic brakes that you bleed, but my bike is brand new I don't think it needs bleeding, I want to tighten it up. So how do you go on to do it, that's what I want to know please.

Your brakes are loose when they stop working. And when they loosen up little by little, they work worse, making it harder to help.
I would suggest contacting a professional, Like someone at Inky's Bycicles