I think it's very good!
The only thing I would suggest is to introduce another (any) instrument before the 1 minute mark.
I say this because knowing it's not a real orchestra (from this post), I was imagining you playing it on keyboard and how you were getting such nice articulation on the strings etc. Maybe that's just because I try to compose this type music too though.
Once the flute came in I thought ...oh ...soundtrack... and from there found it to be very convincing (I'd be curious as to what you're using besides LA Strings if you don't mind sharing).
One more thing, maybe it's just me but I find myself tilting my head like a dog would at 03:14...maybe it's intended but the cello or bass sounds off.
Overall I'd say it's excellent for a first attempt though Bibs!