I had a crank powered am/fm radio, no bigger or heavier than a pack of cards, that used a pair of wired headphones as the antenna. About a minute of cranking got you about 20 mins of surprisingly decent quality radio. I used to use it all the time for years, until it got water damaged camping one time. No chance of doing that with digital radio (or Bluetooth headphones).
FM > DAB
How old are you? You’re an adult, but your sister is taking care of you, and you’re worried about your mum finding out you’ve been on a date? What?
What is this? There is some information missing here to make it make sense. Are you part of a restrictive cult? Are you actually 15yo? There must be something else going on here!