It's a start...
Regarding the fact that it is your first song, it is ok. Not good, but not too bad either.
A few important points:
- Too repetitive. It seems to be the same 10-second-part over and over again, just to reach the 3 minutes. If there is nothing new, then cut it. Make a 10sec-loop out of it.
- Layers are out of sync. The drums don't work with the strings, the strings hardly fit the piano. There's no beat to the whole thing, it's just a mixture of different beats. Which don't harmonize.
- As a beginner, keep it simple. Make an interesting melody and apply it to one instrument. If that sounds the way it should, you may add some more instruments, which don't have a stand-alone melody but compliment the main theme. Don't try to start with the whole polyphonal-orchestrated-thingy.
So... I hope some of those notes are able to help you. (Hm, weird, giving tips without having submitted anything myself... ) Still, I guess they might be of use.
And don't give up :)