I’ll probably play these games with basic knowledge of a couple of animes I have watched
Knowing/liking the original anime series helps, but it's not mandatory. You may get a bit overloaded due to the huge amount of characters, but they are introduced gradually and the game has a big encyclopedia to help remember who is who.
Do you think they will still be fun for me?
Will you like it for the first 10-20h? Almost certainly yes if you like strategy games and big robots.
Will you like it enough to play the whole 80h+ (assuming you go for Y)? That's a much harder question to answer, it will depend a lot on how much you enjoy the gameplay loop.




Try that if you can, I think the little bit of smoky whisky is what makes the drink truly shine.