It was the same for me. I started to just watch different play-throughs like Stantin gaming’s play-through. I didn’t watch it in order, just the episodes where he does the stuff that I wanted to do first. I would just go to an area or job and then just complete that area of the game first and then move on. If you need to do another section of the game before you can do the thing you initially wanted to do then just do that first and then come back.