Try Trailhead Apps

 Build a Cat Rescue App That Recognizes Cat Breeds

Use Apex, Lightning components, and Einstein Vision to recognize and classify cat images

https://trailhead.salesforce.com/projects/build-a-cat-rescue-app-that-recognizes-cat-breeds

 Build an Instant Notification App

Design a system to configure and send custom notifications based on platform events

https://trailhead.salesforce.com/projects/workshop-platform-eventshttps://trailhead.salesforce.com/projects/build-a-cat-rescue-app-that-recognizes-cat-breeds