there are young adults who simply skip over young adult books and go directly to adult books.

in general, a YA novel has a ya-aged (up to 17) protagonist. this follows all the children's guidelines of giving them a character they can identify with, either exactly their age or a little older. however- kids grow up. and you can't just tell them what to read.

i have a middle grade novel where the protagonist is the teacher of the class. so it can be done.

but as for boring, there is a market for people out there who want to read about people in their 30s. perhaps not the majority of the ya market.

so who is your target audience? and is your daughter part of that market niche?