I was thinking today was the BIG day.
Save the boxes should you want to sell something to up grade or need to ship for a repair.
Other than a "look see" for damages I would set the amp in place but leave it disconnected until you get everything sorted and on the air with a 100 watts for a bit. With the large number of unfamiliar knobs plus a unknown antenna the chances for mischief are high and the amp is the least forgiving. Also you'll want to fix any sounding smoke alarms, flashing touch lamps, etc before moving up to 600w.
Nets on 20m and 40m are a good place to start. They call out "Everyone welcome, you dont have to be a member, please check in". Find and download "NetLogger" its free, it lists the active nets, and after check in you can see when it is your turn and pick someone from the list to work.
Once you are up you can post a sked right here, you might get a pile up.