It's ok for a first.
Well this is good for a first submission. The only thing is that it is way too much repetitive. One thing that i think is crucial though, don't make all your instruments play the same melody. Have the bassline play one thing and then have the strings play something different. Then have the guitar play something else. It's ok/good to have some instruments play a few of the same notes at the same time, like they just connected and then go back their seperate ways.
I think that you should make your tracks a little shorter too, because you are new to this and i think that you should concentrate on creating a song instead of working on the song's lenght.
The ending is pretty weird, with the "crash" because there are no crash sounds anywhere else in the song you know you can put some like at every 8 or 16 bar or more frequently if you wish.
A little drum variation could be good, like you have your main pattern and then at the 4th bar put in some extra snares and hi hats just to keep things interesting.
But for what it is, a first song, it's pretty ok. You used alot of samples and you didn't just threw things randomly.
So keep at it, you will get much better with time and practice.