Hi there JGTorr,
It sounds as though you're looking to import photos and videos into iMovie and keep them as separate events. You're in the right place to seek a solution, I'd be happy to assist!
You may find the options provided in the following sections of the user guide helpful:
Import from file-based cameras - iMovie Help
Organize media and events - iMovie Help
If you need further guidance after checking out the guide above, I would encourage you to reach out to Apple Support directly. Below is a resource to get connected with Apple Support:
Contact Apple Support
For iMovie Support, you'll want to click on Music, Apps, and Services>Mac apps>iMovie
I hope this helps,
Cheers!