improving my writing - HOW ?

One simple system:

Write simple short sentences.
One clear thought per sentence.
One clear idea per paragraph.


After your wrote it: Read it again.
write the introduction and then the conclusion.
Not at the start, but at the end.


Last trick: DO NOT expect to get it right and perfect
first time.
Accept that you will read it again, edit it.
At least once, probably twice.

 
Notice how your writing improves.