My sister and her partner are a little crazy and I don’t foresee them planning for their children’s future (the kids don’t even have Social Security Numbers). I do not make enough money to contribute anything meaningful, but I would like to create one for each of them and start with about $500. I plan on throwing money into their accounts periodically as I have the funds, but I’m a bit financially illiterate myself. I don’t know which options are best A, C1, C, and W shares. I also barely manage my own investments, so the simplest options that I don’t have to adjust are preferred.

I was going to open the accounts through Voya (my company’s 401k) for my convenience unless one of the bigger companies would be better.