International shipping configuration on Shopify (payment method via third party)

Hello! I need assistance with setting up international shipping configurations on a Shopify store, including a third-party payment method. I would like support to be able to ship to customers worldwide, and need help setting it up. This will require the use of a third-party payment method, and I need assistance with that as well. With this project, I'm looking for someone who knows how to set up the necessary configurations to get my Shopify store ready to accept international orders, and has experience setting up third-party payment methods. Thanks!