I want to start a helpdesk startup. Is it a good idea?

I'm not good with idea. Approaching entrepreneurship, I find it difficult to simply think of an idea or look for a problem. Hence, I have decided to start with a market and go from there.
I think a helpdesk software is one of the good ones. However, there is a big startup that seems pretty good like freshdesk. Is it a good idea to try and execute better? should I have more feature or simply better ones with focus on the customer?