Unatural Dark Brown Hair to Platinum Blonde?

Basically, Im Bored to Hell With my Hair, And After 1 year of being a dark haired, I want to have a drastic change, my friend is also doing the same change althouh her hair is much thicker than mine, I have dyed my hair since I was 11 I am anow 15 but it is in great condition mind a few split ends, since I cut my hair myself, I know I sound like a complete Physco. I have dyed my hair so many times I have forgotten, well, I am naturally a mucky blonde/ extra light brown. But my hair is compeltely Strange and havent seen my natural colour since 3 years ago. Back to the matter, I want Extremly light hair now, And I have 2 days, And 3 bleaching kits, Nordic Blonde? I’ve been todl this is a good one to use, and if I condition it should wreck my hair completely, But Syaing that I have read the warnign signs of eveyrone I Just never seem to listen when I Really should.

My hair now is a dark brown with orange roots, I tried to make it lighter a few weeks back with cheap dyes, not a good idea, especially when the roots dont match your hair. So I planned on using 2 bleaches int he first day spacing them otu of course, adn conditioning very well inbetwenn then sleeping on it and re bleaching, im scared I will go yellow, my mother used a toner on her blodne hair and it went bluey tinited, but people sya this will take out the yellow form ym hair so I will give it a shot. Please Has anyone got advice, or past experiences?