So recently I started playing Skyrim again and started a new game but let's get to the point.
On new game Ysolda is hostile in Whiterun and I cannot talk to her. The only thing that seems to work is opening the command and entering "resetai" and "setav aggression 0" but that's just one of the problems I encounter.
The other is Ysolda acting as a follower. When I select any follower to come with me and do some combat, she becomes hostile in Whiterun again. When I reset her and talk to her while having a follower with me she gives me follower dialog and when I dismiss her I also dismiss my current follower. Also when I talk to Ysolda I am still able to dismiss her even when I have no follower with me.