I don't know what your end goals are but I'd say the safest thing to do is probably to pick tech that is not yet outdated (eg. PHP) and not too shiny or arcane either (React or Haskell respectively - while both great, probably not the best place to start).
If your goal is to seek employment 6 months from now, I'd say Django / Angular is a pretty safe bet. I guess if you want to focus on one language, you could use Node instead of Django and target frontend development.
If your goal is to seek employment 6 months from now, I'd say Django / Angular is a pretty safe bet. I guess if you want to focus on one language, you could use Node instead of Django and target frontend development.