Hi @moira777,
Welcome to the Pickaxe community!
You can use DALL·E 3 directly in Pickaxe by adding your own OpenAI API key via the Community Actions section. This is done by editing your Pickaxe, going to the Actions tab, scrolling down to Community Actions, and adding your API key.
You might be interested in checking this thread as well: GPT Image-1 Action | How to add custom image parameters by @ab2308
I hope this helps.