I just got att high speed on my puter, how do i get an icon set up to just click n not go on internet explor

i always have to click on moxilla or internet explorer to go on line,and even then i still have to go and type my yahoo or att yahoo in order to get to it. does anyone know how to just have it set up so that i can go straight to my yahoo-att page and automatically be online. also, i can never access my e-mail at arypsilanti@att.net cause outlook express doesn't want to work either so send your answers to arbelleville@aol.com.i'm a little computer illiterate in case you couldn't tell