Help on walnut tree

Hello, this seemed like the best forum to ask. Last night a big storm knocked some branches off my walnut tree in Ohio. Normally I just harvest when the fruit falls to ground but now I have 100 or so walnut fruits hanging from two big branches that broke off. The outside of the husk is still very hard so I was wondering what is the best course of action if they can be salvaged? Should I pick them now and will they still turn ripe?

The branches are big but the fruit is obviously coming off smaller branches attached to the main one, is it possible graft anything and get fruit now or in the future from them?

Firstly what type of walnut is it ?
I have Persian or European type  and I can tell you if that is the case then it's unlikely the nuts will mature nor is it the good time of year for grafting..
I am not 100% sure but I think the American or Black walnut is similar. You are also a bit late to make either pickled walnuts or van noire