little bit confused about keyword research

I am mainly targetting indian job niche
now a new blog
I should use mostly searchd keyword or high cpc?

also can anybody give related keywords
indian jobs
freshers jobs
naukri?

the most searched keyword is going to have a ton of competition. Go for lower volume, lower competition keywords and over time build up to medium and then high comp. It is hard to rank for anything substantial without building links, unless your website is aged and has a ton of content to create topical relevancy. Even then you won't rank for bigger keywords, you have to buy good relevant backlinks and establish authority over time. SEO is more or less a pay to play game, it takes strategy and talent but also money.

Job websites usually combine location with job type for long tails.

Probably a good place to start researching.

Go for the keywords which have a good search volume and low to medium keyword difficulty.