How to solve Rubik's Cube 3x3?

I am in my late 40's writing this post but I am unable to solve Rubik's cube.
Here just I am posting this because I tried to learn this from my son. He just learned to solve within a day but I couldn't.
In this lockdown period, I just learned that Rubik's cube solved in layers and succeed to solve the 1st layer.
It is really fun and brain exercise to solve this puzzle.
My son made a complete video tutorial on this puzzle in 3 parts.
Here are the videoes of my son for solving 1st, 2nd and 3rd layer of Rubik's cube.

Part I

Part II

Part III

If you find his video useful, please like the video and subscribe to the channel.