Thank you for sharing additional information, @Kope.

You can use the backup data that you restore in your laptop as your medium for learning, and it will not affect the QuickBooks data in your office. 

Every time after installing QuickBooks on your desktop computer or laptop, it is mandatory to register or activate the software. This is to ensure that the license will be included in all updates and to certify that your license is not refurbished and activated under some other information. 

This is also important for Plus Subscriptions to flag the start of the billing cycle.

I’ll be leaving you an article that will guide you to navigate your QuickBooks Desktop. Help articles. 

Feel free to fill me in if you have any other questions. Take care and keep safe!