Seconding the people who spoke about how context - the circumstances of someone's upbringing, the ways in which their behaviour such as language use change based on who they interact with, the awareness that so much of how this very subject being discussed is largely being filtered through a generally Western and specifically American lens - is key to writing about different kinds of people.

To illustrate: I'm Singaporean Chinese, born and raised in Singapore. Despite the common Western perception of Asian countries, English is [i]not[/i] a second language to me, it is effectively my first language alongside my mother tongue, because all subjects except the mother tongues (primarily Mandarin, Malay and Tamil) are taught in English here from preschool onwards, it's the main working language etc., not just the lingua franca. By race, (roughly) 74% of people in my country are Chinese, 13% are Malay, and 9% are Indian. Obviously, I do not think of myself as being of the 'minority', because I'm not, and I don't think of myself as a person of colour, because where I live, my race is the 'default' and white people here are some fraction of the 3.something% of the population that doesn't identify as Chinese/Malay/Indian.

So, I have next to nothing to say about writing racial minorities in a Western setting, because that's not my lived experience, I don't know shite. I watch movies, I read books, I know there's suburbs and high schools, and Americans talking about police brutality and BLM on Tumblr, but none of that really tells me what [i]life[/i], regular normal growing up there would be like if I were Chinese American. Ironically, white Americans would know more about that than I would XD.

'But Draco,' I hear you say, 'you're still Chinese! Any tips about language and culture and such?'

Well... Sure, I speak Mandarin. I know something about the practices and myths of my culture. But as has been pointed out, the people of a race aren't homogenous at all. Even where I live:

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[*] For many Chinese, the mother tongue spoken at home isn't Mandarin, but one of the various Chinese dialects, most commonly Hokkien, Cantonese, Teochew, Hakka, etc.. The dialects are not mutually intelligible for the most part, so honestly, people who speak a dialect plus English and Mandarin are trilingual XD. There are older folks here for whom the dialect is their main tongue, and don't speak Mandarin or English (or not fluently).
[*] There are different styles of cuisine too, and I'm a lot less versed in what the differences are between dialect groups, but what my mom cooks at home is pretty mild in flavour profiles, especially compared to, like, Sichuan hot and spicy stuff. We never learned how to make dumplings or noodles, but there are families who still do that sort of thing. 
[*] As far as I know, Buddhism and Taoism are the most common religions among Chinese folks here, but personally I'm agnostic, and Christianity is making some headway.
[*] Names: there are 
[list][*] rarely: people recently from China (for various definitions of 'recent') who have single-character given names, eg. Yang Jie (Yang is the family name, Jie is the given), that's it, Yang Jie is the person's entire name
[*] commonly: two-character given names, eg. Yang Tian Yong
[*] commonly: having both an English and a Chinese name, eg. James Yang Wei Jie, or Yang Wei Jie Cameron, the order tends to be up to the individual's parents XD; no the English name does not have to 'match' the Chinese name by rhyme or meaning.
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So, like, just within my social circles, I know: 
[list]
[*] a family that's really traditional Buddhist, they don't eat beef (this is a Chinese thing rather than a Buddhist thing), sometimes eat vegetarian, go to the temple every Sunday (it's just because weekends are the free time, it doesn't have to be Sunday the way it is for Christians)...
[*] a family that's not just very Christian but also very 'Westernised', they speak English at home, they cook Western fare, they don't really concern themselves with Chinese festivals since they feel that would go against their beliefs
[*] a family that has relatives that identify as Catholic, but they also burn incense for their ancestors every year because they're honoring them through said ancestors' ways, and a grandmother that converted from Catholic to praying to traditional Chinese gods because one time her kids were very ill and she went to the temple to pray and they got well afterwards
[*] families that don't really care about religion either way, just casually celebrate Chinese New Year, and eat mooncakes at Mid-Autumn
[/list]
And so I'll wrap this up by noting that rather than generalities, you might be better served by coming up with a more specific concept on a per-character basis, then going to folks who are familiar with whatever it is you want to do to ask them for relevant details in fleshing out that particular character concept XD.