If your audience is people unsatisfied with their job, then your niche could be helping people make money online

I love what you want to do for people.
Many are unsatisfied with their jobs.
Abie has provided you with a link. Try that and see what you get.
Brainstorm and check availability of a domain to grab.

Thank you. I appreciate you AbieAj

You can search in google

Your niche + affiliate programs and see what results you get

A good niche is something you're passionate about and you would want to still write about it in 5 years time. A Niche is A Group of People Looking for Stuff Once you decide on your niche, you may head to http://namemesh.com try find a suitable .com domain or try go daddy valuation tool to find a memorable name.

You can use Jaaxy to drill down keywords. Look for searches (avg.) above 30 and competition (qsr. ) lower than 100, the lower the qsr the better.

https://my.jaaxy.com/search/keywords

For your choice of keywords, always do an incognito search on Google before settling on a keyword, to see who appears in the top 3 positions.