The first thing the viewer notices is the closest element in a picture, if it is anywhere near the center. In this case it is the tree at center left. The eye is then drawn into the distance where it encounters the theme you have proposed, a forest that seems on fire due to the light coming from the side. So far, so good, but as we now open our gaze to the entire picture, we are abruptly pulled back to the closest tree for what might seem a trivial reason, the white patch at the top caused by the recent breaking off of a large segment of the tree which is now seen to be lying at the base of the tree and of your photograph. So what? Why even bother with such a petty detail? And it is petty. Even a tiny detail such as this can make or break a picture. You are right in thinking the light shining on some trees and not on others is worth a picture. It is worth the viewer’s interest. And it will capture his interest until the white flash tears him away from what you want him to look at and that quickly you have lost him. The odds that this exact circumstance will arise again are almost zero. The odds that something like this will occur again while you are planning a photograph (and it is obvious that you do plan, unlike many these days) is close to 100%. Just be aware of the little things. What could you have done here, if you had noticed that the closest tree was broken? You could have turned slightly and just moved it out of frame. That is easy in a forest. You could have walked one meter to the right. You could have moved forward. Perhaps you wanted this particular tree in the shot because you liked the way the broken trunk looked. Fine, but then you were shooting the wrong theme. As far as the rest of the picture goes, everything is fine. Nice color, nice range of tree trunks and branches, not mix of earth and trees. The fallen tree in the center adds some nice green. One small detail is all that lies between a good picture and an excellent picture.
This is really good. The exposure especially impresses me. I feel like whenever I try a photo like this, I have some combination of 1) poor focus; 2) lighting such that 1/3 of the picture is blown out, 1/2 is dark and very noisy, and the remaining 1/6 is exposed correctly but that portion happens to be a person walking through the frame as I snap the photo; or 3) my composition is ugly and unappealing.
I strive to someday have the skill to make something like this. I'm not yet someone who can find magic in everyday situations, but I have been growing and getting better.
If you are interested in a number of really good pictures taken in forests, check out the four Gallery folders devoted to Forests in the group 'JustCream'. There you will find roughly 100 pictures specially chosen for their high quality. They might give you some ideas of how to approach photography in a forest.