My country is not zoned out by default by Shopify so there's no way to charge people based on where they would like their item to be shipped. A potential solution I have found is to include a map of my country segmented into different zones (ZONE A, B, C...) and the customer would have to choose the zone respectively based on their shipping address. But there's no solution that I know of that could let me display an image on the shipping method selection page. The image doesn't have to be on the page, it could also be in form of a link that opens in a new window.
If there is, please do guide me on how it's possible or if you have an alternative solution, thanks for letting me know!
Unless your store runs on Shopify Plus, there is no way to adjust the code/styles for any of the checkout pages.