Hi @ihdumille!
What you want to achieve is a bit complex and would require customization to do it. Since custom coding is outside our scope of support, I am leaving this thread open for a bit to see if anyone can chime in to help you out.
For additional assistance on this topic, we recommend getting in touch with one of the customization experts listed on the WooCommerce Customizations Page; they can help you build the customization the way you need it.
You can visit too the WooCommerce Facebook group or the #developers
channel of the WooCommerce Community Slack, you could find help from the community of open-source developers for WooCommerce that hangs in there.
Also, the following extensions would help customers to switch currencies on the checkout page according to their preferences; you can take a look at them for pointers:
– Multi-Currency Switcher
– Currency Switcher For WooCommerce
– WOOCS – Currency Switcher for WooCommerce Professional
I hope this helps!