Easier onboarding

[Slackadays]

Is your feature request related to a problem? Please describe. I want to use clifm, but it's confusing for me to get started. I don't know what's happening in the demo other than only 7 keystrokes being pressed. Also, I don't know what specifically clifm can do for me.

Describe the solution you'd like I'd like the readme condensed and optimized to speed up :rocket: the onboarding process so that I and other users can get started with clifm easier. I don't know what the most important commands are so this would be a great addition.

Describe alternatives you've considered There could be a simple tutorial section in the readme.

Additional context I noticed that the readme is really focused on clifm's features and how it's all CLI. However, I don't know why this matters to me because CLIs are already great. Personally, I realized the same with clipboard and fixed it all up after watching this valuable video: https://www.ted.com/talks/simon_sinek_how_great_leaders_inspire_action/c