"Did you need to do a creative writing course to write a book?"

Nope.

I found studying creative subjects at a higher level killed my drive and creativity.

Forced to study in too close detail and analyse, when all I wanted to do was create.

Study creative writing if you want. If you have the drive to study the topics they’re teaching.

But if you want to write, write.

And you don’t need a course to do that.