Like others have said...too much fog, yet the bigger issue you need to solve....your scene currently does not tell a story or feature any sort of landmark/focal point. I'd focus on that. You don't have to go crazy here...a cottage, a broken fence with a signpost, or broken down wooden cart or something, or a twisted deformed darkened tree (think Ferngully movie). Or get creative with elements you already have, a few rocks placed in the center with an opening and then some moody lighting with a focal point and maybe something like this (see image below), with some glowing fireflies bouncing around...and bam, you got something interesting. ferngully hexus tree. look for some reference that tells the story you want to tell, this a haunted forest? A healing forest? A shortcut to get somewhere? Find an identity for it, research some ideas and execute, could be solved by assets, lighting, composition or time of day...or combinations of. Good luck.