Welcome to the Community space, @sennaccts.
I'll be glad to guide you through the steps in entering accounts in QuickBooks Online that will help you with your training.
Chart of Accounts is the complete list of all the company's accounts and balances. In QuickBooks Online, it represents and organizes the company's assets, liabilities, income, and expenses. This way, you'll know how much money your company has, how much money it owes, and how much money is coming in.
For more details, you can click this article: Add an account to your chart of accounts in QuickBooks Online. It also includes a video tutorial that will visually guide you with the steps.
Once done, you can now add transactions in your Chart of Accounts, just go to the bank register to enter them.
I'm adding these resources that will guide you with your training and help you with your future task in QuickBooks:
Please let me know if there's anything else you need. I'll be around to help you out. Take care!