Well, it depends on how you view self awareness & free will, I don't believe either exist in the sense most people do (I tend to sway towards believing we are guided by inner thoughts & ideas which are not of our own making) - Sam Harris has done a few videos on the subject which seem to resonate most with my view.I'm skeptical that you can create an AI with real self awareness (another reason why I think its possible this universe is a simulation and our self awareness exists outside it) you can theoretically create an AI that would react exactly like a human being would, do everything a human would but that doesn't (necessarily) make it self aware - while there may be some level at the quantum scale where self awareness can exist everything above that has absolutely no capacity for self awareness in its mechanics however complex you construct it.
Taking this view, I don't believe it will be that difficult to create a self aware AI (given the current rate of progression) - but I can't know for sure as I don't know, but time will tell.