You can do it, Verla. I read another post of yours where you'd said you're having a hard time with voice as well. My thought on this, and you may have already thought about this, their "voices" aren't going to be that of a modern teen, but of people growing up in another era. So a modern teen voice may not actually be what you need. I can only imagine how hard it is to put yourself in their heads, but it was also a time when they were young and in love, torn apart by war. It will be such a gripping story. You can do it.