I am going to answer the second question by Huw by reading the literature. It would be appropriate to read several references for each aspect, but I aimed to make a tentative answer to the first question for now.
Political Awareness: Political interest seems to be formed differently in young people and adults.
Hata, M. (2016). Mechanisms of formation of political interest among ‘new voters’. Election research, 32(2), pp.45–55. doi:https://doi.org/10.14854/jaes.32.2_45.
Interest in politics is often described in terms of the concept of political socialisation, with young people (the scope of which is ambiguous) adapting to the concept of political and social systems in the early socialisation phase. Then, as adults, in the later socialisation phase, they become interested in politics for ‘interest democracy’ reasons (e.g. parents who are raising children try to benefit themselves by voting for politicians who seek to improve the child-rearing environment). The findings of this paper show that adults’ interest in politics increases the moment they feel that politics may benefit them.