Awww. She seems to be settling in quite nicely. Look forward to hearing how she progresses.
As far as her feet goes, I've used the cocoa butter stick before. Not to thick and 100% pure. It's very soothing and should help with the healing.
As for the grass. I would just take it day by day. Maybe when you take her out, take a couple of pp pads with you and leave them in the grass somewhere, do your playing, take a walk or whatever and if she needs to go, maybe she'll go to the pads, thus, get the association that walking/going on the grass isn't so bad after all.
Good Luck!!!