I agree with what Chinua Achebe said: writing as a creative art is not something you should learn.

Write what happened, make it presentable, show someone and submit.

Chinua Achebe did not go to writing school before he wrote Things Fall Apart.

Wole Soyinka did not go to writing school before he wrote The Lion and the Jewel.

They all started writing confidently as what they read.

But this is not to say you shouldn't learn grammatical rules in order to put your idea in an understandable way.

The first thing in writing exercise is understanding grammar.

You know no one is there to do this for you.

Most especially these days.