Is it possible to fix up a discussion in recent discussions? and maybe color it differently to make it more evident? thanks

What do you mean by "fix up a discussion"?

By "fix up a discussion", do you mean "pin a topic"? If so, yes, it's possible to pin a topic using your Moderation Actions, found alongside the Start New Topic and Reply to This Topic buttons when you view the first post. You can also choose to display pinned topics in a block.