I appreciate your efforts in finding help articles to assist with setting up your books for the first time, @CK_001.
While the Company Admin role has the highest level of access, it's important to note that deleting an account from the Chart of Accounts isn't possible; you can only make it inactive.
Since accounts are interconnected and rely on each other to maintain balance, deleting data from one account can impact the others. Thus, QuickBooks allows you to mark accounts as inactive instead of deleting them. This action will hide the account from your active lists and transaction forms, while still preserving the historical data for reporting purposes.
However, please be aware that several default accounts can't be marked as inactive. You can refer to this article to learn more about it: Manage default and special accounts in your QuickBooks Online chart of accounts.
If you want to make a banking account inactive, it's better to disconnect it. This way, QuickBooks will stop downloading new transactions, but your existing accounting data will remain unchanged.
Please note that the steps outlined in the article I provided apply to your version of QuickBooks. The articles you've read might pertain only to the Desktop version, which has different steps from the Online version.
Feel free to use the Reply button below if you have any additional questions.