I recently received my confirmation/invite from Dall-E 2. I might want to try out a few prompts on their platform, although I've seen some bad opinions rise up around the software.
As for MidJourney, apparently the only way to create an AI generated image from a prompt is to use their Discord server. As mentioned before in my post about not wanting to be present on social media, I'm not planning to join any other such platform any time soon. This indeed includes Discord, so no MidJourney for me.