FWIW my wife expressed a similar interest... I picked up a youth model Mossberg 20 gauge on the cheap just to give her something to get started with and see what she thought about it..
It came with a rib, chokes, short stock (that almost fits her perfectly right out of the box), what they call an "EZ Reach" forearm (for smaller statured shooters), short bbl, etc.. for less than $300 out the door..
She absolutely loves it.. its soft on the shoulder, easy to control, etc..etc..
I've offered at this point to step her up to something nicer and have it modified if necessary to fit her properly.. and she refuses... she thinks that little $300 mossy is perfect for her in every way, and wont even look at a Browning, Remington, Winchester, etc..