Transitioning from relaxed to natural hair help?!?

Im 15 and ive relaxed my hair and straightened it so much that I have multiple curl patterns. I want to grow my hair out back to natural bc im sick of having unhealthy hair. I always wear my hair up in a bun and I was wondering if anyone knos any styles I can do so I can wear it down. Ive tryed bandu knots and braid out but they just dont look right on me... Also any methods to make my hair grow FASTER?? Please help me on my natural hair journey!