When it comes to guns, there is a vast array of information to sift through. Safety is always number one. If you don't learn anything about shooting, or about guns, please at least learn gun safety. You need to be able to teach your children about what to do when they find themselves in a situation that involves a firearm! The Eddie Eagle program from the NRA is an amazing resource for this. There is even a section that's geared toward adults on how to talk to your kids about guns.
The second step in learning about firearms is learning how to use them. A gun is simply a tool, much like your car. Both are useless, and can even be dangerous, if you don't know how to use them!
Once you've gotten the basics down, your next job is to educate yourself about your firearm. I'm going to take it back to the car example here. There is some basic information you need to have so that you can function independently! If you don't know that your car uses gasoline vs diesel, that's a major no-go. Same thing when it comes to your gun. There aren't many problems you can't solve if you at least know the manufacturer and model of your gun as well as the caliber of ammunition it uses. I'm not expecting any of us to become auto mechanics or gunsmiths here (unless you wanna, and then good on ya!), but being able to say "I drive a 2007 Chevy Suburban" makes all the difference in the world when you need new windshield wiper blades and that type of information holds true when it comes to your gun as well. Be able to say "I have a Smith & Wesson Bodyguard .380." It will make all your firearms-related interactions flow more smoothly!