Great Start!!

I commend you on focusing on the melody first. Now we need to do something about your ambiance. I'm not sure what kind of software or equipment you have but I'd recommend finding a good reverb plugin somewhere and adding that to the piano. The sound dies out too quickly and leaves nothing to replace it. The cello part was a good idea to help the song progress, but the track as a whole could use some more elements,,,maybe a wind instrument or some full strings. After that it's really all about your ability to make a song speak, and that I'm afraid I can't help you with bro. Keep working on it though caus it sounds like you get the idea of what composing is all about.