Free Will is an outdated concept which should be confined to the history books.
If you look it up on the Wikipedia there is a whole lot of stuff about the concepts and theory of it, and how it used to apply in religion and philosophy.
I would replace it with something like personal choice - you make your choice according to the spiritual level you are at.
For example, if you and your family were starving, and you suddenly found a small piece of food, your first instinct may be to eat it immediately. But if you listened to your conscience, or higher self, or whatever, you may take on the message that it would be better to give it to your children.Then, perhaps, an even higher part of you may say, 'Well, actually, you should eat it so you have the strength to find more food', and so on. On this ascending escalator of higher, better choices, you will eventually plop onto one choice on a certain step, because that is where you are spiritually, where you feel most at home and accepting of that particular level's message and teaching.