Note that while the last two items can wait until you have tested the software's ability to send a test fax, the first item must be done immediately.
Note that under US law, it is a violation of FCC regulations to send a fax without first configuring your fax machine (software) to identify the sender of the fax. See also Fax Transmissions and U.S. Law.
To configure your software in compliance with FCC regulations, follow the steps described in The newcovers Script.