If you really want to get out of the grocery store you might want to charge a bit more than 'ten bucks a pop' for your music, lol. Just some friendly advice from a professional! It is a common mistake by newcomers to the music industry to undervalue their work or even give it away for free in order to get experience but it just ends up hurting everyone in the industry. It has become a trend for musicians and you don't see this in any other craft. If you want experience just make the music. You don't need an excuse to make a portfolio. I thought the same as you but until I really focused on the music, making music everyday and building my own portfolio I did not have success. Same happens in hiphop all the time, I see so many producers giving away beats and they don't become successful or get much in return for it. It's kind of like dressing for the job you want, you have to respect it like the business it is. We need to value ourselves or there will be no industry left for you to flee the grocery store too
This is advice that was given to me years ago and it has been very helpful. Only telling you this because you wish to do this as a career. As a hobbyist I don't see any harm in doing music for free but if you are serious as making this your career, it is something to consider. Good luck to you and your music