Just looking at your pic, I am guessing you have the kind of hair that reacts quickly to bleach. It looks quite fine textured.
I bet you get great results so long as you don't leave it on too long and don't be afraid to let the toner do it's job. Follow the directions and you should be fine.
Don't be surprised if your curl pattern changes.. it does for many who lighten with bleach.
Use super moisturizing conditioners. The fact you have short hair is fantastic for using all kinds of great colours.
I could see you with a nice bold purple streak or two!