Time limit

I joined about 5 days ago and have a showcase yet no idea how to jump start the activity. I know there's a Time limit to certain posts I just haven't done all the necessary perusing to get that far. How long do I have after joining to get my ads up? How exactly is one to go about that?

The best place to start reading is here:

https://www.eccie.net/showthread.php?t=19347%20f=5