So many questions! I’ll do what I can!

Yes, Aristotle links personal excellence (Arete) to flourishing and happiness. That said, “call no man happy until he is dead.” Aristotle thought fortune and circumstance had an important impact on living the good life. A successful person could lose their wealth and then become unhappy. Worse, one could lose one’s honor.
As to family, friendships, society and politics, yes, Aristotle says we must be active participants in our society. A happy life has friends and family. A reflective person treats people well - mutual well wishing among equals.
How do we balance all this? Aristotle tells us to practice moderation to cultivate virtue. (Too much gold digging would become a vice due to excess.)
Does Aristotle have a perfect system? Probably not. . .