I simply say just jump in. Your quality of music is on production level, in my opinion. Now its a matter you'll find the "right" client or not; ones that like your music. How do they find you? make more, share more, get into them. There are a lot of way to do it on the internet days. Play more and more games and find out who made them; if you target on indie games, contact them, have interest in their games (only if you really like them), chat/message them that you can offer great music regarding to the games or next games, be proactive and genuine. In the end its a matter of how strong you are when tackled on different opinions/rejections while keep on improving.
Good luck, you can do it!