Need some tips

1. before starting to render should I separate everything into layers like a clothes layer a head layer the body layer or should I just trace(line art) everything into one final layer

2. how should I adjust the layers for rendering like I have my main line art (with base colour)

then I clip a multiply layer to the line art and apply shadows lightings etc

clip an overlay layer to the line art do the overlay stuff I want to ig mostly some specifics like I wanna gives some brightness and a waterline to the eyes so I think I should use overlay instead of multiply

3. and finally can I get reccomend a few artists for reference and to study ig currently I have

dinos_illus for shadows and lighting

yoneyama mai for the eyes and

yue for linear burn