Tips for IW Zombies

So I played BO2, 3, and a little bit of CW zombies awhile before i started grinding camos on BO6 this year. I’m not a fan of them pushing cosmetics before fixing the game, so I bought IW about a week ago to try ZiS. It’s very hard moving so slow and all the maps are super confusing without a minimap. I know that’s how it was for years but it’s still difficult to adjust. I feel like i’m slowly learning ZiS and getting better with the controls but i can’t make it past round 12 on any of the maps. Does anyone have any advice for me?