I'm counting vns as vidya specifically so I can post Muramasa quotes in this thread

>Been reading Muramasa for the first time
>Just finished Chapter 3
>Doing everything completely blind
>Killed someone I really didn't want to kill
What the fuck do I do now? Is it better to just accept what my decisions have led me to and power through? I feel like going back would make me a coward or something.