Security camera system

Would it be possible to run a session or two on the topic of setting up a security camera system? I avery keen to learn. I would like to run a security camera system at home that I can view from the internet but I first need to learn and understand how such a system works. While I have considered purchasing a unit complete with x number of cameras, I would prefer to have a system where I can add some smaller inconspicuous cameras. I have checked with a couple of people who purchased sets recently and haven’t been able to set them up. I assume that once set up I will be running such a system in one shape or form continuously for years to come and monitoring different locations so I would like to have the systems under one umbrella so to speak.