What can I do to help my feral cat?

I know it's been a year, but it is a phase. I think you should give it some time, but until then you need to have a lot of toys or play areas to account for her energy. Cat nip may help. But she wants attention and something to challenge her, so definately consider some kitty toys and kitty play groungs. Eventually this will p and you will miss the kitten behavior she has.