Visit the Overskill YouTube channel for videos published by the team. Use the videos currently listed there; this article does not promise a live-session schedule or a replay for every session.
Videos can show an earlier version of the editor. If a control has moved, check the written help article for that task and describe what you see to support.
Start with Build with Overskill, not against it for building habits and Your remix URL and sharing your app for copying an app whose owner has enabled remixing. Watching a demo does not grant permission to copy its app.