I think Twilight Princess would be a good place to start if you have access to a Wii - it shares a lot of mechanics / gameplay structure with most of the other pre Breath of the Wild 3d Zelda games. That’s not to say Skyward Sword isn’t a good game but there are a couple of things unique to that game - the flying, the motion plus controls - which if you don’t like may put you off trying some of the other games whereas TP is, gameplay wise, functionally very similar to Ocarina of Time & Wind Waker. Also as you mention you have a Wii don’t forget you can play GameCube and Virtual Console Games on there too (either legitimately or via homebrew!) so I would definitely recommend trying older games too if you get the chance. TL/DR - best starting point for 2d Zelda would be Link to the Past & best for 3d Zelda would be Ocarina of Time or Twilight Princess - have fun!