The colors in the backround aren't matching the colors of the focal. Incorperate some more of that deep red and orange. The backround is way too blured. Try to have some areas closer up sharper than those farther back. We have FBS (Floating Body Syndrome) happening here. A fog usually doesn't taper off like an teardrop. Try looking at some reference photos of fogs and people to see what I mean. Keep working on it. It would be beneficial to folow some tutorials (especially compositionl tutorials) from beginning to end to get a feel for sig making.
It needs some more effects in the foreground to improve the depth. I like the colors of the background, but the render doesn't quite fit.
to tell the truth it actually isnt a render lol those are the original colors to the stock but yeah it needs blended but i am still thinking of a way to do that lol