How to get into the Scoring business

I just got a gig writing a score for an upcoming TV show that a friend of mine is doing. The show hasn’t been greenlit yet, but they are shopping it to CW. The style of music is orchestral hard rock, and is all instrumental (at this point). But with this being an non-released, not yet greenlit show in the CW market, I’m not sure how much of an “in” this will be for me. I’ve always wanted to do game soundtrack music, TV and film. Any hints on how to get into that market?