You can sign up for beta access in the meantime, but OpenAI hasn't given a timeline for access. I think eventually they'll open up some kind of playground like they did with GPT-3 and sell the service to other businesses.

Currently some prominent AI researchers, artists, and journalists have access to DALLE-2, and some have been taking requests from social media and posting the results, like https://twitter.com/hardmaru/, so you can check their feed for a few examples or give a few ideas when they ask again for ideas.