The Polite Society Podcast https://www.youtube.com/channel/UCkVLaQzRB5DKDzZ05J7o2KQ on YouTube has created a series for new gun owners called Guns 101. Each segment is a short (less than 10 minutes) standalone lesson in various fundamental aspects of gun ownership and usage.
The Tactical Professor did a segment on storing guns in cars when it’s necessary. For instance, if a gunowner needed to go into a courthouse, the Post Office, or other denied area, the time to think about what to do with the gun is before you get there.
Also, my book Indoor Range Practice Sessions http://indoorrangepracticesessions.com is an excellent primer for new gunowners who actually want to shoot their guns. When the ranges start re-opening, you can have a plan for when you go.