If I wash--either because my bleed test failed or the fabric is from smelly source--then when its out of the washer it gets dried one of 2 way--either I really shake it out hard and put into dryer or, my favorite method, is to hang it on the clothes line to dry--very few wrinkles this way. Problem is not many folks have clotheslines anymore!
I don't press until I'm ready to cut-and then use steam(which if I haven't prewashed will deal with some shrinkage) or if that doesn't get out wrinkles, then Best Press. About the only time I use a heavy starch is after I cut any bias cuts(like on the Tri Recs ruler) and then I will spray some in an old pie pan and holding a stack of the fabric pieces needing starch, will just "paint" the edges of the whole stack.