Welcome to the Community, @danrawls1. If you're looking to change your currency in QuickBooks Self-Employed, Sole Trader, and Simple Start, here's what you need to know:
Currently, the home currency setting cannot be changed in QuickBooks Self-Employed, Sole Trader, and Simple Start. Consider upgrading to QuickBooks Essentials, Plus, or Advanced if you need the ability to switch currencies.
For a detailed guide, please refer to the Set up and use Multicurrency in QuickBooks Online article in the "About Multicurrency" section.
Additionally, I've included some helpful articles for connecting your bank accounts and categorising transactions:
If you need more help, don't hesitate to leave a comment. We're more than happy to assist you further. Take care!