How to check keyword competition of any keyword

How To Do Keyword Research For Blog
It was 2018 And After lots of struggling with my blogging career. I get to know about Micro Niche and Blogging. I got some ideas about How to check Low Completion keywords and then how to make a blog on it (this is what we call micro-niche Blogging) from a pro blogger. I was excited about it.

So I Bought an Ahref Account From a Reseller for Rs 100$ and start my Researching. I was fully Depended On Ahref data because at that time I didn't know much about how to Check the Competition of Any keyword. I just only knew that if Ahref shows keyword difficulty less than 10 or 5 or maybe 0 Then it means the keyword is easy to rank.

So I started putting keywords on the Ahref Search tool and suddenly I got a Keyword whose Ahref Difficulty was "10". So I chose that keyword for my first micro niche blogging.
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