How do you hide your real salary from your family?

I(25M) am doing an internship for 10k INR for the past few months and recently just got a offer from a UK based startup.

I will be earning in dollars.

I am not married, I just have my mom and sisters in my family.

I don't like to lie to my mom, but I can't trust her financially.

My dad earned a lot in the past. But my mom's friends would tell her sob stories and borrow money from her.

We've lost more than 3-4 Lakhs like that.

Also my sister's family thinks all our money is their money & my mom would brag about it to other people, which attracts unnecessary attention from people.

I'm looking for detailed answers about how to divide money. what I can invest it in, percentage breakdown, different banking accounts you can use, your personal experience etc.