There are many places for documentation and help. This forum is the best place for Linux questions that I've found. Google has a special Linux search engine that I also find useful --
http://www.google.com/linux
There are many "HOWTO" pages that you can find with Google Linux. In fact HOWTO is a good search argument to try. Perhaps "HOWTO+suse+adsl" would be a good search argument to get a list of sites that may help you.
Study multiple forum replies and howto pages to find those that you are most comfortable with before actually trying things. Favor help that relates to YaST and not the command line. Bash commands are very powerful but not the best place to start when you're a newbie. Changes are best made with YaST or another GUI. Reserve the command line for viewing rather than changing. That way you will learn without messing up your system to the point you have to do a new clean install. A clean install can however be a good place to start but if you do stick to a stable release. Beta and alpha are not the best place to learn. Research try some things and come back here with with focused documented questions. We will all try to help you.