Thank you for taking the time to introduce yourself. I hope that TalkFreelance lives up to your expectations and you'll get to meet some of the amazing people here. I'll certainly be there for you if you require any kind of assistance.
From the Rules that you might have skipped during the registration (I suggest reading them to avoid getting in trouble):
"Members must have raised privileges (ie, be in the "Registered Users" usergroup) before advertising within the marketplace or within signature blocks.
Consequence: 1pt infraction."
Your account will automatically get there in 4 days:
"In an effort to reduce problems with new accounts and advertising, new accounts have restricted privileges. They cannot use the Private Message system or create new threads in the Marketplace or certain other forums. After being registered for four days (regardless of post count), these privileges will be raised to that of normal members (being able to send/receive PMs, etc.)."