People generally think Rubik's Cube as a genius puzzle. It may have been a tough one in its beginning years but it is a rather simple puzzle. There are many approaches to solve this 3x3x3 Rubik's Cube. There are different algorithms to solve it. The most used approach is called CFOP. It was popularized by a lady called Jessica Fridrich.The method works on a layer-by-layer system, first solving a cross typically on the bottom, continuing to solve the first two layers (F2L), orienting the last layer (OLL), and finally permuting the last layer (PLL).
The fastest recorded solve is 4.69 sec by Patrick Ponce. 15 year old Patrick Ponce (USA) set a new Rubik's Cube Word record single with an amazing 4.69 seconds result on the second round of the Rally In The Valley 2017 Middletown, Virginia USA competition on 2nd September 2017.
There are plenty of solve videos in the Internet. You can learn any approach to solve it. If you are a beginner, you can learn it within a week. Enjoy cubing!