Need Social Media Promotions and marketing for online published novel/book sales.

I have a non-fictional novel/book already available on different online platforms in India like Amazon, Flipkart and Kindle.
I also have my website (www.penmanpiyush.com) which can be used for promotional purposes and brand building.
I Need a freelancer on a monthly basis who can work on Sales, Promotions, and Marketing of the book on Social Media platforms, and other book platforms.
He/She will work on promotional adverts, images, posters, and content development including social media management.

Whoever applying must provide similar work portolio in the past, (THOSE who NOT work on similar, please DON'T APPLY)
Please give a proper plan of work, schedule, and tasks to be taken care by him/her on monthly basis.

Please share your past portfolios on similar lines.

Thanks
Looking to have a fruitful journey.