I am worried about the crazy people who can hack our computers , iPhones, etc. Do you have any suggestions to protect our devices? Norton Life Lock?
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This is a very large question and I do suggest you look through my answers section dedicated to the topic of scams and viruses located here:

scams | Answers | Sells Consulting
viruses | Answers | Sells Consulting

Now that that's out of the way, Norton Life Lock…no. Not a fan. Several reasons:

1. It's yet another subscription. Don't we have enough subscriptions these days?
2. Running a piece of software doesn't protect us from falling for the tricks that are out there where we are asked to type our admin passwords. I've yet to find a legitimate save that I could attribute to Norton.
3. You can pull your own credit every year and even lock it until you need to use it without subscribing to Norton.
4. As long as you are extremely hesitant to not type your password in when presented with the option to do so, unless you fully understand why you are being asked for it, you're ok.
5. Most of us get scammed because we tend to believe what other humans are telling us, not because something installed on our computers without us knowing.

Your iPhone and iPad are not going to allow malicious software. The only way that something can land on your iOS device is if you install it through the Mac App Store. Apple vets every app they allow into the App Store so that's a level of safety we can count on. Above all else, don't join wifi networks that don't require a password. That's the best advice I can give anyone when it comes to security.