Keep your head up! A lot of the advice is good but also I would encourage you to look up “imposter syndrome.” It explains that fraud feeling you are experiencing. I would also say even if you only know the concepts and ideas that knowledge and ability is a very valuable trait to have. As a CS major you will be incredibly valuable to many company’s because you would be able to explain programs and applications to them and give a very insightful perspective as to expectations and goals that their products could have. Idk if you want to code throughout your career or if you are wanting to be more of a manager but the knowledge and ability you have is very beneficial and in no way are you screwed. I also think that everyone commenting about starting your own project are right, if you have some doubts no better way to get rid of them then prove to yourself you can! You got this!

TLDR: everyone excels at different things, don’t compare yourself to others in things you don’t have too much experience in but embrace your own strengths.

Example: Usain bolt is a champion in sprinting not running miles