I liked your story.
Your worldbuilding is pretty cool. It reminded me of the anime "Frieren" at first, from its style & thematics. The best thing to me was your interpretation of magic. That basically every dream of someone is caused by magic.. or a perception of magic. This was also a good introduction to the sorcerer.
I think you can trust your audience a little more to connect the pieces. After that "Crub still thought about the question of the sorcerer", you take too much time (for my taste) to tell the reader "on-the-nose" that there is a sorcerer. You are obviously very talented in inventing fantastic & magical stuff. The images in this story are truly innovative. But for a short story, you take a little too much pride & time in describing your stuff. The description of only the sorcerers physical appearance (which IS awesome) took around a quarter of the whole story.
I liked the idea of the Giant's Pines, but the timing to introduce them couldn't have been worse: the hero just presented his problem of insecurity. The tension was growing. And then you introduced those Pines, which stabilize the whole world & give a feeling of security & orientation.
So: worldbuilding, magic & creativeness are your definite strengths. The story tells about inner conflict & bravery. Even teaches a little lesson, which is great. Please keep those skills. Get your understanding of atmosphere right, so you can build it up instead of breaking it. Restrict your pride a little (hard for me too). Then I can see unimaginable fantasy-stories come out of your fingers.