Learn Hebrew Quickly???????????????????????

I am a teenage Jewish girl, who wants to learn modern Hebrew online quickly for free. The point, I am taking ASL and will take another language also, and I want to be multilingual. I can't seem to find a place online that will teach it quickly for free. I know the letters and script, but I basically can't read without vowels. I would like to learn it within a year, does anyone know a way for me to do this????? Thanks!