Hello guys

I'm new to this industry, never composed for a movie/video material before.
Until now I've invested a lot in sound libraries and constantly tried to improve my sound.
I'm looking for some sincere/professional advice. Take a listen at my last track that I've created for my portfolio (Interstellar inspired me ):

What do you think I should do as a starter composer and how do we make it in the industry when all we've got is our creativity?