Do I have to sign up for this at WhatsApp and have my first templates released? Or is there something like a "test account" that doesn’t require registration?
You can have access to a full-fledged account and use it first internally and for testing. Therefore, even at the “testing” stage, you will still have to register and provide message templates.
It might sound more time-consuming; however, it comes with the perk that you can test a full-fledged account without restrictions or limitations. If you have high traffic and want to test capacity, we can also provide you with a sandbox.