Hi dear.
It's nice to meet you!
As I am a skilled web developer from Ukraine, I have mach experience with wordpress site building, customization and bug troubleshooting.
Sure I can create a new shipping method for your site, and other your project requirements. Please have a look of my previos job on wordpress https://www.freelancer.com/projects/php/wordpress-payment-geteway-integration/?w=f
If I come to you, we will discuss the details of the work in the chat. I will be glad to work with you.
Best wishes, Luybomyr.