[tribuchet]

You are stuck in a mental structure. There are many good advises which help you to gradually improve that structure.

You can also try to leave it and come back with a new set of mind.

Do something new (and safe), without preparation. E.g. take your phone, go out into the street, let the internet select a new, random song and play it aloud, and dance to it. The more people who see it and the more they are puzzled the better. Also: Allow yourself to enjoy it a little bit.

You will see that you can do anything. You don't need all knowledge in advance and it doesn't matter how others judge it. Write your assignment with that mindset.