If you arrive at 10am you should have enough time, the rush hour is gone, I know you can catch it at T2 A, you might need to look online.
I know that between T2E and F you can catch the RER which will bring you to Orly rail one change, not recomended if you have some luggages.
Most of the time the eastbound flights arrive ahead of time, if I was in your shes I would take the AF bus.....