Need help registering for classes

I got a email saying I can register for classes now and I have no holds. This might be a dumb question but do I still have to pay the registration fee?

on top of my stupid question I also have no idea what classes to search up and what I need. I am going into my first year of child studies but am unsure what classes to even be registering for. I have an appointment with my programs academic advisor on Tuesday, but I’m worried by then all the classes will start filling up.