I need to change the home currency. I've just started the company so don't mind losing data

Where is your company located? Why do you need to change your home currency? Make sure you are using the QBO Global version for your country.

https://quickbooks.grsm.io/EU

https://quickbooks.grsm.io/North-America

My company is located in Georgia (the country, not the US state). I’m using intentional version of QbO

I set the Home Currency as Georgian Lari by mistake. In fact, I need it to be USD.

I seem unable to purge my date (which is not yet valuable as I’m just starting). Purging data would be fine for me. 

If you are using QBO Simple Start, you are unable to purge it but opening a new QBO account.

https://quickbooks.grsm.io/Asia-Pacific

then you may have 2 options to deal with USD currency:

1. Pick QBO Essentials or Plus to enable the multi currency and set USD as your home currency prior to posting any transactions.

2. Keep using GEL as your home currency and open a virtual USD bank account at Wise. You may keep accepting GEL for your domestic transactions and accept USD payments thru Wise. You may convert your USD balance anytime you need to GEL.

https://wise.prf.hn/l/64dl92k