I'm interested in learning about Ancient Greece and their civilizations, but I also find it hard to be completely engaged due to feelings that some of this isn't necessarily relevant to me as an African individual, and I have witnessed many claims of ancient greece being relatively diverse (or atleast in terms of areas the greeks inhabited noting greek settlement of the southern mediterranean, black sea, etc.)
So I was wondering if we are aware of any cultural, philosophical or other contributions of these people they may have come into contact with
The discussion of race in the ancient world is a popular topic here, but fraught with difficulty. Whenever it comes up some people outright bristle at the notion that the ancient world didn't consider race in the way we do, and that our modern conception dates to a (relatively) recent time, around the Enlightenment and Renaissance.
I always feel like people talk past each other on this subject - the bristling people feel like this is an attempt to paint the modern world as a more oppressive, backwards place than the ancient. That's not really the intent - the ancient world, of course, could be xenophobic and violent, but they had their own reasons. They didn't need to invent new in/out groups to categorize people. They already had plenty of ways to do that based on things like languages and birthplaces. Famously, the word barbarian comes from the Greek word for people who didn't speak Greek.
So that said, here's an answer from u/iphikrates discussing diversity in the ancient world.
Notably they did care about skin "color", but not in a way that relates to race but that a dark skinned man clearly spent plenty of time in the sun performing his work and other civic commitments and so that appearance was held in higher regard for men.
More can always be said, but in the meantime check out this answer by u/Trevor_Culley and this answer by u/Iphikrates.
If you want to read more about cross-cultural exchanges in early Greece, I recommend Burkert's The Orientalising Revolution for a general overview, Boardman's Early Greek Vase Painting (ch. 5) for influences upon material culture, and West's The East Face of Helicon for literary influences.
Hope this helps.