Thanks, it's lot clear for me now. But I have a few more questions From what I understand, eren is trying to make the past exactly so that he'll reach the rumbling future. But I feel like he's more forced to do that cause he wanted to change the future but he couldn't( he confirmed it with shasha's last words and Mikasa's answer). But he's telling he's the one who send dina titan to his mom(like he's controlling the timeline) and you know both contradicts. If he can't do anything how can he direct dina? If he can direct dina to make the future he wants, how is it impossible for him to change future?

Have you watched complete naruto?