If the person is willing to listen, many banks offer basic financial advice. I've listened to DR a bit and my little brother uses his program, or used to at least.
We had a local person get some press a while back. She developed a budget and financial management program after her own financial troubles.
https://www.thebudgetmom.com/
My Mom manages a trust for her younger brother, due to issues he has that started with his service in Vietnam. Personally I wouldn't put a sibling (or other family member) in charge of another someone's trust share. Hire a professional and keep family out of the line of fire.