When I run small co-creator workshops, I usually want keep the invitation painless and simple. My solution is an open Google sheet. All the future participants have to do is add their email. Here's the simple event invitation template for you.
Here's an online workshop micro timer in a Google Sheets template that's easy to copy and use to help any organiser create and facilitate better online workshops and events.
Do you want to get people together and create something? I've organised a lot of informal sessions for learning, sharing, ideating and validating. Here are some basic tips and practical tools for you to get started with your first online workshops.