أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
You need not be an expert to blog, you just need an audience. You don't need hundreds of thousands of followers. Just a few people who treat you as a knowledgeable person at this level.
If he is a good writer, and has some good skills on social media and how to market his blog, I think any person can make his own blog if he has a story or some knowledge that he wants to share.