Total Noob, Please help

Okie, im helping my friend out with a website and her brother got the server and username and password set up for me. Well I can get in fine, troble is, I dont know where to go from there. I thought that I would just go in and be able to actualy see the site and everything like other site makers. (who knows maybe you can and I just dont know how.) If you know a way for me to do this, or a suggestions on something else that i could use with the server and username that would be great! Thank in advance!