Welcome to the QuickBooks Community. I'll ensure to share details on how setting up QuickBooks works. Before that, I want to thank you for choosing QuickBooks as your accounting software.
Each version of QuickBooks is designed to address specific business needs. QuickBooks Online our web-based product allows you to access your company anywhere in the world as long as you have an internet connection. That said, yes, you can save your work while setting up QuickBooks as long as you've already made a user ID and password. This way, you're able to log in to your correct account and route you to the page where you left off to complete the setup process. Then, connect your bank account later on.
Also, you're able to personalize QBO to work the way you want it to. You'll just have to modify some preferences on the Account and Settings page to turn features on and off. For more details, please check out this handy resource: Edit company settings.
I'm also adding this article to further guide you in effectively managing your business using QBO: Help guide for QuickBooks Online. It contains topics about advanced accounting, banking, and payments to name a few.
Let me know if there's anything else you need help with. Know that I'm always here to help you anytime. Take care and keep safe!