Yes you may. You may post any link for as long as it's clean. The only exception that I know of are for referral links.
Whether you can though, I don't know. There are limitations imposed on newbies and I'm not sure whether posting clickable links is one of them. It wouldn't hurt to try though, so go for it!
Thanks! Yes, i want to put ref links inside.
Unless you want your post to be deleted, you shouldn't add any referral link(s) on it as it is against the rules, you can find it here:
https://bitcointalk.org/index.php?topic=703657.0 (I suggest reading all of it)
Just post the site's url as it is.