Hello Doge, Brandon is always a good start to learning!
https://www.youtube.com/watch?v=ye21r27kN9I

Here the full tutorial playlist :
https://www.youtube.com/watch?v=90BghUX7SD0&list=PLxfQIomHccxvoTON6hXhfZyAUdFXd-z1P

Also, you can start simple by reproduce creation like Kirby, just copy, don't try to improve anything, when you are confident enough, try tiny addition like adding third arm, third eye, haircut etc....
https://www.spriters-resource.com/game_boy_advance/kirbynim/

what software is this? i really wanna learn how to be good at pixel art but don't know where to start. Any pointers?

Muito bom!

Flawless work

Perfect work