Replacing google maps with yandex map in wordpress theme

I am looking for someone to replace Google Maps with Yandex Maps in my WordPress theme. I already have a Yandex Maps API key, so that is not a concern. However, I want to maintain the custom map styling that I had with Google Maps. Additionally, I need the ability to have multiple map markers on the new map. It needs to be implemented in theme functionality. Ideal skills for this job include experience with WordPress, Yandex Maps API, and custom map styling. Theme name Citybook