Still not the atmosphere i had in my mind. Make the fog more lighter not in color but in distance. So you can see more trees in the background. You should also tint down that bright pine (on the left) or delete it. The blue mushrooms are only placed at one spot and that makes it looks ugly, tint them down, place them at more places or just delete them. The dark green shrubs (not the grass) are not looking good, delete them too or place them far in the background, but not too far. Lower that stone ( where the book is on ) closer to the ground. Scale the light to bigger so that the textures don't look so strong or just tint the light to make it soft purple.