depends who your next of kin is really, you have stuff even if you don't have assets per se and you might have wishes on how to be buried/cremated and so on
probably not worth getting a proper big lawyerly one all notarised and such but can't hurt to write a document and keep it in a safe place, if nothing else to make your intentions clear -- even if it's not legally binding hopefully your NOK will follow it.
i don't know about a will as in, the document that says who gets what when you die, but I think it's always good to have a living will, which is the document that says what you want health care-wise if you become incapacitated and incapable of answering questions. You never know when that could come in handy -- hopefully never, but if it does, you'd be glad you had it.
hollyhoppet OP wrote
like i certainly don't plan on dying until i'm at least 69 but i am in my 30s now