I too come from no an undergraduate major in the social sciences nearly 15 years ago and no formal training the visual arts outside of a single course I took at a local community college. My practice really only gained steam in the past few years. I'm of the opinion that you have to communicate what strengths you bring and be honest and effective or portraying what you hope to gain in 2-3 years of study. For what it's worth, I was accepted into my top choice program and I'm waiting to hear back from one other before making a decision. I say this all to say if you haven't followed the traditional pathway, do not fear. If anything studies in creative fields should be open to individuals outside the traditional pathways less we limit the lived experiences and creative practices that different pathways bring. Be authentic and find a program that will push and nurture you. Ultimately it's about your own growth so finding a program and location that speak to you is the most important factor I believe. Good luck - I'm excited for the next chapter and challenge ahead.