One thing almost everyone is genuinely terrible at is thinking about large numbers. Any time you can take huge numbers and make some more comfortable comparison, it's a huge help. Here someone put together a history of the known universe (13.8 billion years is the current best estimate) and condensed it down into ten minutes so you can get a sense of the relative timescales.
Don't hold your breath looking for humans. We don't show up until the very last frame.