I believe that Infinity is not an immeasurable amount of time, but rather-Timelessness, or in a state where time is no longer a factor.
Imagine you could freeze a moment, turn around and look backwards-you would see an uncountable number of 'you's crisscrossing every inch of the globe you have ever traveled, all the way into your Mother's womb and into the separation of your Zygote into sperm and egg. Turn and look forwards and you will see every step you will take until death and cessation of perception.
This IN NO WAY invalidates Free Will. All the steps you have taken or will take were of your own will or from the actions of other upon you. It's just that, with the illusion of Linear Time eliminated, it all happens at once because Time is no longer a factor.
So....why Linear Time in the first place? Stephen Hawking believes that Linear Time is a side effect of multi-dimensional shear forces upon the dimensions that we perceive and know-and since he's got the degrees and I don't, i'm just going to take him at his word...
Or, in the words of a more ancient wisdom-"In the Beginning was the Word. And the Word was of God, and the Word was God". Most readers of the Bible will quickly notice what appears to be two contradictory themes-full, personal responsibility for one's mistakes, and at the same time the refrain the "there is nothing new under the sun" and the perfection of a predestined order of things. So...Free Will or Predestination? Minus the limitations of Linear Time and given freedom of the Infinite, the answer to both choices is simply a resounding 'YES".
(don't worry, I confuse Me too)...