So you're saying that infinitely many time-lines exist coinciding with your infinitely many choices to any situation. When you arrive at a life decision that we actually do make the decision at that point in time and choose in which direction the time-line will go(that we have control), or that the time-line has all those infinite branches to represent infinite decisions, but that the ones we will make basically are hard-coded into he time-line to give one reality that concrete and unchanging (in the 4th dimension).

Please note that this is oversimplifying things to say that decisions are arrived at, because decisions are actually made infinitely across the time-line by you at any given time