I am starting to want to dress a little bit more grown up

I mostly have jeans and t-shirts ,some of them with cartoon characters on them... I used to be able to put and outfit together ,but I got old and I just started not caring.
I thought about doing stitch fix but I'm not sure .
I really have no idea what is in style and is appropriate for a woman my age.
Any women my age that are fashion divas and can show me what's in style these days?