there are a few choices in...step one....
locate a local quilt shop, stop in & browse, ask questions-including 'do you offer a beginner class?'
browse the library for quilt books- pick one up- read it. the 'big book of quilting' is a good start.
do a search for beginner quilt patterns
search 'color-theory' articles
jump in, buy some fabric you love and make a simple patchwork quilt (like cut 6"-8" squares & sew them together) then you can move on to step 2 & learn about layering & quilting your piece.