For a first timer this is solid! Chordal choice was quite interesting at times and the melody was well structured with breathing pauses and good variation with a calm gentle nature.
However I feel like there could be more. The song itselfe is good but it feels like its stuck a bit and needs some variation. Maybe having the melody played by different instruments, introducing a counter melody like an ask and response thing with the melodys or playing with the dynamic of the song to let the song tell a story and take the listener to where you want him to be.
Needless to say, this is complaining at a high level and those are points I would criticise with composers with much more experience. So please just see those points as a friendly suggestion. :) Because you did quite well.