[tutus]

The feelings you described are totally normal. One day you will know that you can solve the problem. One day you will know that you won't fail. One day you will collect feedback after the presentation and continue to learn how to do better the next time.

Also, maybe this job just isn't the right fit for you if you are constantly doubting yourself and feeling unsure. It may be a good time to start planning toward the next move a few months from now.