Online market place

Hey BH,
I want to start an online market place where people can place free ads for free and get buyers(buying and sellind place based on locations) and it should also be a job search platfrom.
Please any help on how to do this?
Thank you in advance..

You'd probably get more replies if you posted this to White Hat SEO forum https://www.blackhatworld.com/forums/white-hat-seo.30/

Or Making Money forum..