How to set timing after replacing the timing belt?

So, I'm in the process of replacing my timing belt because it failed and it's all ripped, but before I removed it, I'm trying to set the timing, so crank shaft is set the to right is set at 1 on the line but the one closest to the fire wall is offset its ahead of the mark. All match except this one. So how can I get them all set to the mark? Or at least this one because the other two are already set. But everything I turn the engine to reset the marks it always ends up ahead. I'll post some photos hopefully it's clear enough but if not I'm sure you know what I'm getting at. Always am I also able to pull the belt off then set the timing before I place the new one on. I'm just a back home mechanic so still learning. Please need help. Greatly appreciate it.
By the way the belt is still on but pretty much rip to shreds.