Fetching a specific Image

Hello lads.

I have been trying to design my own portal recently. Actually re design the default mybb portal but now I have come to dead end. The thing is I want to fetch the first image from a post and display it on the portal. Now since I'm particularly new to MyBB I don't know how to do that. If someone would be kind enough to help then I'd really appreciate it.



Cheers and regards