If you want to know the whole truth, if you truly want to know, there is no "one stop shop" which will tell you everything. You will need to begin digging and researching. If you stumble upon something you have never heard of then take the time to find out about it, and follow that rabbit hole. If you read something which makes sense to you, cross reference it, and try to find other sources which concur or contradict with your findings. This is a great path to becoming intellectually enlightened. There are millions of pieces in this big puzzle, and if they are good pieces, if they are truth, they will align with the rest, they will be able to withstand skepticism. Skepticism can serve us so long as it does not become aversion to blatant evidence. Believing in something regardless of the evidence is dogma, finding evidence of something despite what you believe is truth.
The following documentary discusses many aspects of our connection to the past, and the possible truth of our origin, which has been suppressed. The hiding of this knowledge has been used to create a power paradigm of inequality, and that has been capitalized on for thousands and thousands of years. Michael Tellinger discusses the advanced knowledge which has been lost and otherwise obscured by the greedy and powerful, and how the reemergence of these understandings can help the state of the world today. The technology discussed is not centralized to southern Africa, this is a kind of technology that was available across the world as more research is done. We see evidence of this when studying the true history of Egypt for instance. We find that the pyramid was not a tomb but rather an intricate machine which gathered and transmitted a kind of wireless energy.
If this is something that resonates with you and you would like further reading please look at; The Ancient Secret of the Flower of Life by Drunvalo Melchizedeck, The Sumerian Text translations done by Zacharia Sitchin, The Earth Chronicles, and The Sirius Mystery by Robert Temple. There is also a lot to be taken in from some of the more popular religious texts when viewed in light of this new knowledge, from Christianity to Hinduism, each of these can be enriched by incorporating this new evidence to broaden our perception of our origin and perhaps our destination. The answer is to keep questioning and the dream is to awaken.