What I should do to prepare for a lawn?

[TokyoElbow]

I've just moved to a place and have a garden for the first time.
I want to have grass but have no idea where to start.
There isn't any grass now its mainly weeds .
Can anyone help me out to find out what I should do to prepare for a lawn.

cheers

Elbow

(Tokyo)

[Marlingardener]

First, get rid of the weeds, either by digging up the entire lawn area and removing them, or by spraying the area with vinegar (herbicide that doesn't leave a residue in the soil) until the weeds die.
Then, find a local store that stocks grass seed and consult with them about the best kind for your area (sorry, but here in Texas if it's green we call it a lawn, so I don't know much about different kinds of lawn grasses).
Level the area and make sure there aren't any big clods; if you can get your hands on some compost, spread it around; plant the grass seed as evenly as possible and water it in well. Keep the soil moist, but not soggy until the grass is well-established, about 4-5 inches tall. When you mow for the first time, make sure the soil is dry so you don't leave tracks, and don't bag the clippings. In the fall you can add another inch or two of compost as a top dressing, or wait until spring to do this.
Don't let someone talk you into fertilizing your new grass until its second season. It is young, tender, and prone to fertilizer burn.