This was a very interesting composition to listen to because, even though it is simple, I found the melody very creative. This stands out compared to some of the other compositions I have reviewed here because, although some people have a lot of experience with music theory and instrumentation, their pieces can be quite complex while still having relatively weak melodies. Yours, despite being simple, has a rich melody.
So, I believe that if you continue developing your musical studies, you can reach a very good level with this melodic approach. The idea was very interesting, and I also liked the variety of instruments.
Of course, I could tell that you are still developing your own musical language. So, I would recommend studying more harmony and voicing, while continuing to apply what you are learning about instrumentation.
Nevertheless, this was a great first step. Congratulations!