Hey Anuj,
This is something which I have been struggling with too!
Here's the approach we’ve taken - focus on even the low volume keywords which are important from a business perspective and optimise content for it.
The other thing you could do is look for keywords that are an alternative to your product offering and might have a higher search volume!
Apart from this, of course there's the competition keywords you must focus on. Volume might be low but it gets you the right leads.
Quality >>> Quantity!
Hope this helps!