aha. I didn't always get this message but it was "Danger! Cargo bay integrity overload detected! Restore integrity first."
i had to jettison cargo and then modules to get back... i then restarted the tutorial...

My ship will not jump back to Earth from a tutorial mission. i just fought a drone for combat training. I have no damage and full crew. I guess I would like to just start over but have no idea how to do that. Would anyone be able to point me in the right direction?

Thanks!