To draw in comic draw style, start with simple shapes and build up. Experiment with different pen strokes and pressures. Also, look at how light and shadow interact to give your drawings more pop. It takes practice, but you'll get there!
Kakashi might be initially surprised. But then, he would probably use it as a teaching moment for Naruto. He could say something like 'Naruto, stealing is not the way of a ninja.' And then give him a punishment like extra training.
First, sketch the basic shape of the hot tub. Decide on its size and proportions. After that, draw the water surface and any decorative elements around it. Also, don't forget to add some shading for a more realistic look.
Kakashi would likely be very concerned. He would immediately assess Naruto's injuries. If they were serious, he would use his medical skills to start treating him right away. His first reaction would be to make sure Naruto was stable and out of immediate danger.
Kakashi might immediately offer a comforting presence. He could put his hand on Naruto's shoulder and just be there silently, letting Naruto know he's not alone.
Kakashi may also get angry. Angry at the people or things that caused Naruto to get those scars. This anger could fuel his determination to make Naruto stronger, so that he can better defend himself in the future. He might then intensify Naruto's training, all while having a new - found sense of protectiveness towards Naruto.
In 1995, to draw comics, you needed to have a good understanding of traditional art techniques. It was important to master shading, perspective, and figure drawing. Also, knowing the popular themes and storylines of the time could help.
For comics 1942, focus on mastering the line work and shading styles popular then. Pay attention to historical accuracy in settings and costumes. And don't forget to study the color palettes used in those comics to make your art authentic.