Well $50 is not alof of capital if a newbie does want to invest in crypto. I will say it is better for a newbie to invest that than for him not to invest anything at all.
I think it will be best for him if he only has $50 to buy only Bitcoin and Ethereum. Those are 2 coins we know will make big gains if you just hodl them.
Some of the other alt coins are more of a risky gamble. I think he should not invest the $50 in meme coins only Doge if he wants to invest in those.