Struggling to make a decision

Salam. I'm currently in a situation where I need to make a decision regarding my career/education. I prayed Isthikhara. I have an inclination towards one decision but I'm scared to take it. I'm worried about whether it will be good for me or not. I'm so worried and stressed. Because if I make this decision, then I cannot turn back to this position in the future. It will shape my future. I really don't know what to do.