Why can't I make a thread with links an images?

[SRSeller]

Tried to make a thread to sell my knife but i can't upload it? ...

 

[solo]

you're too new to the site, get a couple messages first.

 

[Unavailable]

You can easily do this by introducing yourself in https://www.mc-market.org/forums/introductions/ and join discussions in https://www.mc-market.org/forums/general-discussion/