Canah UwU's Things

My sister, almost 26 planned to marry a Chinese dude, 29 next month in June or July.
Long story short, they never met in real life, they just met this month.
Someone introduce my sister to this Chinese dude. My sister doesn't have work for now, since working in Philippines with the salary of bare minimum won't get you somewhere and they are picky and have high standard of education so my sis is getting a hard time to look for a new job, so someone she knows introduce him to a Chinese guy who's looking for a wife, 29 years old and apparently he is an "Introvert" that's why he doesn't have any gf yet, and willing to support my sister, has a job, house and a car. So anyway, the one who introduce him to my sister is working on my sister's visa in China and they planned the wedding in June which is I hope this won't happen at all nor continue.
I am very against this

Why? Because THEY DON'T EVEN SPEAK THE SAME LANGUAGE
The dude doesn't know English. My sister doesn't know mandarin that much so the two talks in we chat with translation, but how can they even understand each other??
Second, My sister is pretty but not beautiful enough to treat with pretty privilege, so we don't know the purpose of the guy why he suddenly wanted to marry a filipino woman, like how can we even trust him!? What's his purpose of marrying a filipino woman???
Third, my sister doesn't really love him, she's marrying for the opportunity to go abroad and find a job in China since working in Philippines doesn't get you somewhere, that's why a lot of Filipinos goes to abroad.
My brother, mother and I against this but my father support my sis because she's already an adult and can make her own decision.

The one biting in the neck stuff to be legal mates. I wonder where it was originate. So I was making an omegaverse story, thinking maybe I should put on the neck stuff. But I was having a second thought because, the biting the neck stuff is kinda weird considering
1. Won't the omega bleed to death if they bite very hard? I saw how they draw this. A lot of blood came out. What is the alpha bit where the blood flow? Does they need to be ER?
2. Won't humans receive some kind of bacteria from the bite? Consider mouth is the most place with bacteria.

Can you give me more some ideas and stuff about omegaverse? The lore behind it or more ways to become legal mates.

And send my manuscript to a publishing company who's asking for BL novel manuscript But the thing is I am Beginner at this. I've only written fanfics before but we won't know unless we try right? Anyway, My question is for people who likes to write books.

Do you prefer first person or third person?
Any tips for this starving and amateur writer?
How should I fix my grammar and writing?
Thank you for the kind people who answer.

I'm planning on writing a BL book with omegaverse theme. I want to ask what's makes omegaverse good?
Exclude things like Male omega can get pregnant, But pheromones thingy, fated mate or biting one's neck to be mates is good? Or cliche and boring?
Whats your favorite omegaverse BL? (Alpha x Alpha enjoyer, sorry to burst your bubble but I'm looking for Alpha x omega)

My cat is important in my life, I'm panicking since she's straining to pee ever since afternoon, (She May have some bladder blockage or UTI, idk) I know there's a problem with her and she needs to immediately taken to a vet but the thing is, things are rough nowadays. I don't have a job, my mom just lost her job last month and I'm still studying. I'm just in college, struggling with tuition, my family doesn't have money either, I'm living day by day eating noodles or processed food, yes, I can't afford to take her to a vet considering the vet is very expensive, and I live in Philippines. I can't take a damn loan, but I can't just let my cat suffer, I don't want to lose her like I've lost my cat before.