If you don't know the answers to these questions, it will be difficult.
Your situation is completely hopeless if you want or have to reach three different target groups with one text.
You can try to hit three dartboards with one arrow.
Impossible.
This means:
Put yourself in the shoes of kenya telegram screening a typical representative of this target group and answer this typical reader two questions about your text:
“What's it about?” and
“Why should I read this now?”
Once you have found convincing answers to these questions, the rest is technology.
Speaking of technique: Here are 3 timeless ingredients for a great writing style.