How can I find part time jobs as per my area of interest? And how can I find genuine part time jobs?

I would take advantage of the classifieds:

Check out the newspapers' classifieds sections. There are still sections about the job market.

Also check out classifieds websites.
There you can find thousands of jobs usually grouped by location and
professional field.

A third option are classifieds search
engines, that collect and list job ads from several pages, for
example askalo, Yakaz or Daily Lister.
With those you don’t need
to check multiple pages.

I would take advantage of the classifieds. Check out newspapers' classifieds sections. They still have sections about the job market.

Also take a look at classifieds websites. They have countless jobs.

A third option are classifieds search engines, that collect and list job ads from several pages. I had good experiences with askalo for example.

To find the part-time jobs,
you can rely on the leading online job portals such as Monster India. It is a
great platform to discover job opportunities. You can narrow down your search
to the location preference with the help of refining search option available on
the websites. You can even refine your job search based on your industry,
function etc. When you need the guidance, these portals offer interview tips,
career guidance etc. So that you can find the best employment. To get yourself
register on the portal, you just have to provide requisite information and
upload an updated resume.