So, I’m tired of all these companies having access to my information and data. I’m also trying to limit security concerns from hackers and general lowlifes. Is this possible? Is there anyone who teaches or guides on this (preferably on YouTube as im a bit of a visual learner).
You can have a relatively high level of security with your home automation. Based on your description so far, you will need a system that offers local control without cloud service reliance. There are several systems HomeSeer, openHAB, Ezlo Hubitat, HomeAssistant, and more, that provide this capability.
I’m afraid I cannot recommend a specific YouTube training series. Most especially with the DIY local only solutions, it is a journey of learning that you must find and follow for yourself.