BIKE WONT START!!

I just got my bike (zxr250) about 3 weeks ago and i take it out for a few short rides a week since im still getting the hang of it still.
past 3 or 4 days it has been really hard to start from cold.
I give it a crank and it starts for a few seconds then shuts down. Another crank and it doesn't start so i keep cranking and holding it every 3 or 4 seconds just to be safe, after 3 or 4 goes it dies out completly.
Misson no^1 is get the bike up d drive way which isnt that long but it has a steep to it, and then pushing it down the road and clutch starting it. once it gets going i warm it up and then take it for a quick run, i turn it of and straight after it still doesn't start.
A friend of myn said the battery takes a while to charge and i don't want to keep push starting it, i know kawasaki's are hard to start but damn!
FIRST question, is leaving the bike to long in the garage bad for it or do i have to take it for a long run to get it charged up?
Second question, is this normal or shall i get it checked out,
Lastly where abouts is the battery in the bike so i can have a look and consider changing it.
I'm new so yeah im still learning about my bike but its getting to the point where i need some help.
cheers all!, fadi.
past 3 or 4 days it has been really hard to start from cold.
I give it a crank and it starts for a few seconds then shuts down. Another crank and it doesn't start so i keep cranking and holding it every 3 or 4 seconds just to be safe, after 3 or 4 goes it dies out completly.
Misson no^1 is get the bike up d drive way which isnt that long but it has a steep to it, and then pushing it down the road and clutch starting it. once it gets going i warm it up and then take it for a quick run, i turn it of and straight after it still doesn't start.
A friend of myn said the battery takes a while to charge and i don't want to keep push starting it, i know kawasaki's are hard to start but damn!
FIRST question, is leaving the bike to long in the garage bad for it or do i have to take it for a long run to get it charged up?
Second question, is this normal or shall i get it checked out,
Lastly where abouts is the battery in the bike so i can have a look and consider changing it.
I'm new so yeah im still learning about my bike but its getting to the point where i need some help.

cheers all!, fadi.