If you indicate the limitations of your experience and they genuinely helped you be "woke" as it were, then I would write about it. I've met plenty of white people including my brothers who, as a result of limited exposure to cultural diversity, are ignorant to struggles imposed by the existence of the race social construct. If you are acutely aware of these things thanks to your brother, then this is a great topic. I strongly suggest though, that you acknowledge the limitations of your secondary experience (something I wish I'd noted more explicitly in my essays). Exposure to cultural diversity is NOT the same as being an individual of a marginalized identity.
Sent from my iPhone using
SDN mobile