Help me help my grandma for her investments for retirement

Hey guys, so I’ve been doing some research overtime trying to get myself into these investment stocks for retirement and I’ve talked to my grandmother about this showing her the positive side and what comes from it now I got her interested and she wants to start investing. she has a good amount of money. She can invest weekly and monthly, but I wanna know what you guys would do if this was your grandmother. What stocks would you do? Do to get her the best return in the next 10 to 12 years? What’s y’all’s opinion??