How to post pictures on the computer version of Instagram?

I don't have no touch iPods, tablets or and Android or iPhone. I only got a stupid Blackberry torch that does not support Instagram and I'm dying to use it. I know that they offer it online now but I have no idea how to add a picture. I had to use my dad's phone to sign up since he has an android but he put a password on his phone so I can't use it anymore. So can someone help me?

Are people really that obsessed with photographing their food?