Dia,

It is obvious you care and love your younger brother.  It looks like you will be swimming up river to try to effect any changes with him.  What I mean is that he is 18 and mostly formed by being spoiled by your parents.

I am not sure if you can really do anything for him considering how he was raised and how old he is.  You can push him, encourage him, yell at him, cajole him but he has already been trained to feel entitled and privileged.

If he does anything because of you it is not from his internal motivation, desires or goals.  This is a short term “fix.”  Once the external pressure (i.e. you) goes away then he will probably fall back to his current way of thinking and behavior.

Since you are such an open family, share your concerns with them but you are not responsible for his life.  He is.

It is good to understand the difference between meddling and caring.

Mark