With the increased threats of viruses, malware, and hackers, it is essential to secure your home network. While there is no single 100% solution to secure your home network, there are several actions that an individual can take to help make it more secure. Things such as setting/changing the default router password, hiding broadcast networks, and setting encryption level can help increase your home's network. The following website contains a fairly comprehensive list of actions that you can take. If you are unsure of how to do something, please consult our router's manufacturer's website.
https://www.comparitech.com/blog/information-security/secure-home-wireless-network/
https://www.wired.com/story/7-steps-to-password-perfection/
You can also download the attached PDF file from SANS Institute which discusses home security.