Take an internship. And yeah, that means you won't be paid. But you are far more likely to get that. I highly doubt you'd be hired with a tiny/nonexistent portfolio, anyway.
In the meantime, see if you can take at least one graphic design class, preferably something which you could use for MA credit if you ended up going in that direction. But do try to build a portfolio. Also, if you aren't getting paid, you will need to support yourself somehow. Rich uncle? Waiting tables? Selling on eBay? I don't know; you tell me.
It is not easy to change careers/ambitions but it is possible. However, generally what happens is, you take a massive pay cut and eat a lot of ramen for a while, until everything is sorted out. In your case, that means you need to get a portfolio, and you need to make some industry contacts.