My Grandmother gave me money to invest for her

Hello, I need your advice. So my grandmother gave me $1000 to invest in crypto for her for Christmas. I know how crypto works, I've invested before, just not a really big fan of it or have a ton of experience. I was planning on putting $500 into Ethereum, and the other $500 split between various alt coins. Is that smart? Or should I put more into Ethereum or bitcoin and ignore the alt coins completely? She said she doesn't want to know about it for a couple of years so short term losses aren't important. Also don’t know if I should wait to invest it or just go all in now.

Edit: should have mentioned that my brothers also got $1000 to invest so I have to prove that I’m better than them