Fred wrote
Nightjar wrote

Why would you want to make your own flat pack furniture? Its main
purpose is to save storage space in warehouses. If you want to make your
own furniture, a 1/2" router and a dovetail jig will make a much better
job.

I know that dovetailing is the proper way to do it but I thought
I'd start simple and work my way to the cleverer stuff later!

You're actually starting with one of the more difficult approaches to do.