Avoid being too precious about your original thoughts. Be prepared to write multiple drafts until you get it right. Make no mistake that it can be difficult to write simply and therefore takes a lot of practice.

Mastering the written word boils down to a few simple rules, which can be spelt out as follows
Grammar, punctuation and spelling.

Understanding the fundamental rules of writing is the key to producing a professional product.

Learning to write is no different than any other skill. You must break it down into its purest form, examine all the parts that make up the sentence, determine how and why they work together as they do…before putting them all back together again.

Only if, and when, that occurs can your writing work as it should.