PHP Blog?

Hey dudes! I was wondering how can I create a blog system with PHP. The thing is that I don't have much time to do it. I have very good knowledge of PHP but not that good in javascript or others.

Another option would be using a CMS but I don't have time to learn them. If I had time, would be better to learn a CMS?

Pd: I have good skills in SQL.

What is your advise for me?

Thanks!!