I'm having a crazy day today, and I'm really busy! I have more work than I can handle!
Since you've finished the first few steps, you're now ready to actually start working on your satellite. The first thing to do is design your satellite's subsystems.
Design your satellite's subsystems.
These are part of every satellite, no matter what its function is. Every satellite needs to have an orbit, attitude control, a bus, a communications system, a power source, an internal computer, and a grapple fixture.
There's lots more information on this site to help you learn about these subsystems, so I'm going to get back to my work now.