So I started working at a job soon after I finished my college studies. Currently, I am assigned a task to rectify some calculations in some fields of an application, of which I was given bare minimum knowledge about and they (my manager and other subordinate) expect me to know it all and think I should be able to finish the task.
The problem lies as I don't exactly know the hierarchy of the application and can't figure which class refers to what and how the exact functionality takes place. And I won't lie, I feel hesitant/scared to ask help too many times and I guess even my manager thinks I am incompetent now.
Should I just let my manager know the case? Do I keep struggling like this and hope to slowly learn all the things related to my work?