The North still made the first move, by occupying the confederate fort and refusing to leave. This is middle school history, no need to hide the facts.
It was not a Confederate fort to begin with. It was a Federal fort, though construction hadn't yet finished on it at the time of that SC tried to secede. I'm not hiding any facts, you just had a bad middle school history teacher.
The Confederate troops fired first, at Fort Sumter.