This is great work for your first time. It’s very easy to get stuck making music with blocks, especially in FL, but your phrasing already feels natural and there’s a clear sense of movement.
As the others mentioned, the arrangement could have been filled out a little more, but the instruments you picked fit together very well and sounded cohesive. My main note would be to experiment more with expression and dynamics so the instruments feel more natural, and that’ll probably come pretty quickly as you keep writing and experimenting. Some bass would also have helped fill out the bottom, which feels a little empty right now.
I wish there were a little more story behind the theme, but for what you were going for (fantasy adventure) you got it down, and it was very easy listening. Good work, and keep creating.