How to get live veiw on my nikon D3000?

I want to take a pic looking at the big screen not the small peak hole, is there a way?

Nope.

Yes. Sell the D3000 and buy either a D3100 or D5000. Sorry, but the D3000 doesn't have Live View so you'll have to use it like generations of photographers did for years - use the viewfinder to compose and check exposure. Or buy a new camera.

Nikon D3000 does not have Live View Function

Replace it by a D3100. Or learn to use a viewfinder and discover that it works so much better.

There's none.
You'll get used the the viewfinder if you can't afford to upgrade right now. I know I did, now there's no way I'm using the live view again!