Yes, the thought of doubting oneself is something commonly experienced, especially when embarking on something new, particularly something challenging. But these difficult situations are what shape us.
I remember having a conversation with my primary school friend, who is now pursuing her master’s degree in the UK. During her bachelor's degree, she complained about how tough her project supervisor was. I felt pity for her and encouraged her. She replied, saying, "She loves dealing with tough people because they are the ones who bring out the best in her."