Welcome to the Community, @Mnews. Thank you for your interest in learning more QuickBooks Online (QBO), so you're able to manage your husband's company. We're unable to provide the better option for you. But I'd be delighted to share the benefits regarding them.

With the VIP self-paced course, you'll have unlimited access to our training library, email support, and weekly Q & A sessions. This way, you'll get the best QuickBooks support in the world. You can also look for the other self-paced QBO courses here. 

For the 2-day online class, yes, it'll cover the bank reconciliation. Your dedicated trainer will discuss this when you go to the "Accounting tasks & concepts you must know" topic. There are available dates for this, and you'll want to check them out through this article: Upcoming QBO Classes. See the screenshot below for your visual reference. 

Once you've chosen the right course for you, you can now resolve the items on the missing checks report. Just start from the oldest year (2016) until 2019. I also recommend consulting your accountant for further assistance regarding this. They can help you ensure your husband's historical books are accurate. 

Lastly, I recommend visiting this Community article: Reconcile Workflow. It contains in-depth details about starting, fixing any difference, and completing the reconciliation process. 

You can tag my name (@RaymondJayO) if you have any other concerns. I'm cheering on you and your husband's continued prosperity while using QuickBooks, @Mnews.