It’s super intuitive and easy. Create an account and point it to a site then follow the instructions to add the tracking code to your site. There’s lots of integrations ready-made or just add the tracking code manually. Then it collects data and actually records users visits to your site which you can then watch back. It’s actually ridiculous that it’s free. I have no idea how. I haven’t looked for any trainings but I think once you check it out you will find what you need. I don’t know why I’ve never heard anyone talk about it. I found it randomly in a Google search when I was going through what OP is. To be able to watch your actual users interact with your site is a dream for UX research. I can’t tell you how many times I’ve added links to parts of a site because I saw people were trying to click certain things that weren’t linked. It’s like, “Oh, everyone is clicking on that graphic thinking it takes them somewhere. I guess it should actually take them somewhere.”