Okies, no need to worry too much, mycsu is pretty easy to navigate around once you get used to it.
When you go into mycsu, there is a panel down the bottom left hand side labelled "quick links". Scan down that and you will find a tab round the bottom of that which says "Subject info", click on it, and the page will reload, a number or other headings will appear underneath "Subject info" and the one at the top will be "My Timetable". And that is the link that you are after. If will open up another window, which will ask you to select a semester, and then you will get a window that has listed all of your subjects for the semester, click on each subject to view its schedual.
Generally for the majority of courses you sign up for tutes during the first week of classes. I would advise getting in contact with your faculty to see how things are done. Or post a message on you course forum in myscu and someone may be able to shed some light on the matter for you.
I browse around my.csu, i don't seem to find anything.