stolen money

Q: I'm going to be as precise as possible. We are all humans, but I'm a Muslim too. From childhood I may have taken/borrowed someone's money and never returned it back. Like I ask Mom to give me 100 I'll pay u back, but I don't, or I go to a store and the bill is 12 rupees and I pay 10, I say I'll pay u 2 more next time but then I don't coz I literally forget. I mean I even stole money from my mom n dad a few times, it caused fights but I never got caught. But now as I know that I'm mature enough and I repent what I did intentionally or unintentionally I want to pay back every single person I stole money from or borrowed it or just forgot to pay back. The problem is I have 0 to no clue that how much money I actually owe and to whom. Please help me. I give donations and stuff in the name of Allah but I still fear I might still owe people. I'm fully aware that my sharing this question with you is making you a witness of my sins but please don't judge, I'm only trying to seek help and Allah's Forgiveness. What should I do?

Q: I have stolen my grandfathers money in my childhood but now my grandfather is not with us. I don't remember the exact amount. Now what should I do? How should I repay it?

Q: I used to bring my grandmother's pension. One day I took 1000 rupees without telling her from her pension. I want to pay her now but she has passed away. What should I do?