I think once the muscles in her neck develop a bit more, it'll be easier for her to do this herself. I used the cross-cradle position for a long time too - I found it easier to get a better latch. But you could start practicing with the cradle position (her in the crook of your arm), and use your other hand to guide your breast a bit (I just hold my hand under my breast to prop it up a bit). If you get the nipple pointed in the right place, take advantage of her rooting reflex - if she senses the nipple near her mouth, she should turn her head and open her mouth - then just tip her towards you with your supporting arm. I also really like the breastfeeding tops with the flap to cover most of my breast when I feed (I never got the hang of using a blanket to cover us!).