Thank you so much for your valuable feedback! @Nyrryl-Cadiz - I was not expecting to hear to keep it as is and dove right away into trying to fix it after I posted this, lol. But thanks so much for your input! It helps me be more confident in my art and I appreciate your feedback so much!
This is the road I started going down before I read all your helpful comments. @Gary-Wilkinson - As you can see, I tried to add a glow on my own but yours was done so much more elegantly that I tried to find how to do it on Youtube, haha. Omg this glow attempt is so embarrassing in comparison. And I was also thinking about shadows! I tried to have them light the ground underneath them instead, but.... that was a fail.
And below is the result after taking in everyone's feedback! I used an airbrush with "screen" as the blend mode to get the glow. I'm not sure if that's the right way to do it, but I think it's close! These ghosts look like they're having way more fun than my original post, so thank you all so much for your help!
I do like @xin-li's suggestion about the leaves. Would it enhance the image if I added leaves or would it be too busy?
If there's anything else I can do to make this better or if I've taken your advice and applied it incorrectly, please let me know! Thank you again! So grateful for this community!