Create a cron job to automatically clear cache
Thanks to @No Sssweat, @kiamlaluno, @Rick B, I've got an answer.
Firstly, I learned that is not a good practice to clear cache automatically every minute or so often.
Secondly, I figured out that I can solve this problem without using a cron job at all, but I have to understand these tag based caching mechanisms.

The problem was as in the image attached below, Page-Caching was Tag Based, so selecting None option solved my issue.