Is there a best practice for invoicing for hourly work on quick books? The way I am doing it at the moment doesn’t seem very very efficient.

Hello Raggie-walker23-, thanks for posting on the Community page,  so you can set up projects and enter their hours through weekly/single timesheet. Here are help articles to look at that have all the steps you need to do. 

Create and manage projects in QuickBooks Online and Accountant

Track hourly labour costs and profitability by project in QuickBooks Online

Enter a weekly timesheet in QuickBooks Online

Enter a single time activity timesheet in QuickBooks Online