Welcome to the forum!
Learning about the world of conspiracies is a long journey. You can see from the list of subjects on the home page that it can take years to gain even a brief understanding of what has transpired in the past. You might want to visit
Tranquility Lane to learn about the great whistle-blowers of history that have given their all to expose many of these conspiracies. You should then search these topics on YouTube while there is such a service and be sure to download the videos for your own reference and to share with others.