I have done some tutorial videos on youtube, but I want to know if there is an ultimate place, website, channel I can go to to just learn everything about Unreal engine 4. Please help. any and all advice will help
Well your first step would have been to search Google:
There is no ultimate place, but I personally would recommend you to start a small game project, because “learning by doing” is the best way to learn how to use the engine (that’s how I did it) 
During the development you will have questions which you can post here into the forum or answerhub -> we are always here to help