Hi there, JJsCleaning!
Yes, you can. Just set the Date filter to Year to date, and this will only show you the list of invoices in 2021. You can also click the DATE header to sort the transactions in ascending or descending order.
As for the paid invoices, you can wait till the payments are posted in your bank account and downloaded to QBSE, so you can categorize them as income. You can also enter them manually.
The invoicing feature in QBSE is for tracking purposes only. That's why you'll need to wait for the payment transactions.
On the other hand, you can check out the references for QBSE on the main support page. You might need them in the future.
You can always go back to this thread if you have additional questions.