I can share some information that can help you with reconciling your accounts, @Bhuertap.

Yes, after undoing the initial reconciliation, you can proceed and reconcile your bank account for this month.

Here's how:

1. Go to the Gear icon (⚙) and click on Reconcile.
2. Click the Account dropdown to choose the account that you'll reconcile.
3. Review the Beginning balance. Make sure the beginning balance in QuickBooks matches the one on your statement. 
4. Set the Ending balance and Ending date on your statement.
5. Review the Last statement ending date. This is the end date of your last reconciliation. Your current bank statement should start the day after.
6. Click on Start reconciling.
7. Follow the prompts to finish reconciling your account.

For detailed guidance in reviewing your opening balance, start reconciling, and comparing our statement with QuickBooks, check this article: Reconcile an account in QuickBooks Online.

In case you'd encounter any errors while reconciling your accounts, the following article will guide you in fixing them: Fix issues at the end of a reconciliation in QuickBooks Online. 

I'm always here if you need more help in reconciling your bank account in QuickBooks Online. Just let me know by leaving a reply below. Take care and have a wonderful day!