Also, I draw offline - I mean not-digitally. Just take my copics markers and go to the streets (or sit at home actually)))! Most fast sketches I draw in my travels. For example this one - from Kaula Lumpur (Malaysia). These persons are great - so look on the photo to))
As you can see - I do not follow some colours and details from real life. For example, in life, all dresses on the lady are red - to make it more expressive I have changed one colour to pink and gathers start looking better.
Same with the guy on the left - I make his colours less dark and we can see him better.
One more small art lifehack - in the real life all of them had space on the sofa between each other - I decided to draw without this space to show how they are close and in the same moment - very far because of smartphones