Minors?
Get ya mum to buy it dude, if she's letting you smoke she's already cool with it surely? Just research what you want from where first and it'll be all good. It's not like she's gonna have to be really sly about giving it to you or anything, no one will give a toss. One word of advice though, no matter how much you want a smoke over there, DON'T buy from the street dealers, you'll just get mugged