u sure? https://files.catbox.moe/1vk85k.png

I watched Destiny first, almost 20 years ago, when only that was available in ISP's LAN and I did not even know SEED existed.
It was not hard at all. I just remember meeting characters and events here and there, that were considered "legendary" or like that. It's common in a lot of shows even without prequels or backstory text material anywhere.
Then again, people in Japan may have picked the show on TV from random places and still have some fun.
Now, if available, I suggest trying chronological order.