There's another saying - It always seems impossible until it is done. I know a guy who got into the film industry doing animation, graphic design, set design and special effects (all the things I'm crazy about) just by teaching himself. He has no accreditation, no diploma, no certificates, nothing. He just decided that he wants to turn his curiousity and passion into a career. It took him three years to teach himself everything he needed to know, and he went on to find a job in the industry. He started at the bottom and worked his way up, and he did it.
I find his story absolutely fascinating. It's amazing what can happen if we set our minds to it. That's why I feel that if it seems like you're stagnating or being held back in life due to circumstances or just the person you are... it's bullsh!t. Change is your choice. It's all up to you to make things better in your life. Just start doing it, piece by small piece. Set yourself goals, not too big, and go for it! One day you'll look back and realize how far the small pieces have brought you.
But for pete's sake stop complaining about crap that you can change! And don't say you can't. Because you can. Happiness is a choice, it's a mindset. Success is a choice, not a circumstance. Get over it, get out there and become who and what you want to be. It doesn't help you thinking you can't be that person because of this or that. Change it then. Work on it or around it. And don't give up until you're happy!