Cohesion & structure in writing
Follow this Oxford dictionary link for help with cohesion and structure: https://www.lexico.com/grammar/writing-help/building-a-piece-of-writing
Good writing
This is a link to a lecture by Steven Pinker at the Royal Institution on the subject of good writing.
Improve your writing with Cambridge
https://www.cambridgeenglish.org/learning-english/free-resources/write-and-improve/