Process

read from left 2 right

1. ok jut sketch regularly.. really nothing special here.  i always set it to multiply when i add my base colors though
2. i use pen/brush. it doesnt matter the settings tbh. i put them there bc why not
3. i add a dark bg + go ahead and start/shading rendering the face(i always start with the face)
4. i render it some more  + add a better  bg 
5. render more +  i always try 2 keep a consistent  shading style but it differs all of the time
6. i add my finishing touches and change some saturation /values etc. i also added  a cool design behind the circle. hot.

and also u can do any of this with p much any brush...  as long as it blends/has opacity n shit like that

and also this is not a tutorial so dont treat it as such
im jus showin u my process bro