Fight for your dreams. Because dreams... are the gears of your life. There is a lot of chances in this world, in this industry, and for sure, everyone has its own space on it. So... If music is your dream, just fight for it...And be humble and honest with yourself and with the others.
Don´t ever give up and take it seriously if you really want to be successful on this. Networking is a really important but do not act like a jerk. I already know cases of people that are trying to start in the business but their names are already in the “black list” of fellow composers and professionals of the industry.