Watching some of the best contemporary poker players on YouTube is the best way to learn how to play poker, imo. Only don't watch games older than 3-4 years because the style can be outdated. Daniel Negreanu, for example, is not bluffing these days as he used to in the past. He's playing more cautiously now, and it pays off for him, while people following his older style are losing in general, and keep wondering why. The answer is, different times have different strategies that are successful.