How can I get my own Wi-Fi?

Hello, I'm interested in learning more about setting up my own Wi-Fi network. Can you tell me the basic steps I need to follow to achieve this? I'm not very technical, so please keep your explanation simple and straightforward. I'm also curious about the different types of routers and modems available, and which one would be the best fit for my home. Additionally, I'd like to know if there are any security measures I should take to protect my network from potential threats. Can you provide me with some guidance on these topics?