I believe this is the correct forum for this, please move if not and sorry.
I'm a little over 10k words into my current project, and am still having a bit of trouble getting into the voice to write it correctly. First a little bit of background : The main protagonists are a pair of brothers, 15 and 11. The main plot points are about the boys trying to understand how their parents are involved in a war that is breaking out. The setting is similar to Europe, with a group of smaller nations all closely positioned and different points in the story have the boys behind both friendly and enemy borders. Technology is close to a Hayao Miyazaki styled WWII. Some fantasy elements with good trench warfare aspects.
So i've written from the point of Jack, the older brother and plan on focusing on him as the true "main" character as he attempts to protect his brother and face any immaturity or doubts that linger around in the head of a 15 year old boy. My biggest issue right now is how to stay within the head of Jack but still let the reader know how Jacob(the little brother) is dealing with the situations.
Basically, how do all of you get into the head of your protagonist without all of the other character's creeping in aswell? Do you do anything special to help yourself really get into the main character's POV?
Bonus Question! : I'm hoping this story ends up as something that younger and older readers can both enjoy. But there is a fair bit of violence planned in my outline. I'd like to hear your opinions on how far I can take the battle scenes before it would be considered too graphic for a younger audience?