DoppleGangeriosGods

I found instructions to manually boot into Safe Mode for the iPhone 6 which I assume would work the same way for the iPhone 6s+. I powered up the device and then held down the Vol + button, but the device turns off while it's still on the Apple logo. During the 60 seconds the device is on the Apple logo, iFunBox doesn't recognize it. I went into DFU mode, and iTunes recognizes my device, but iFunBox still doesn't.

While texting in messenger and imessenger my device would get a kbd crash (keyboard crash?). I tried to find the culprit, so I began by turning off everything listed as BytaFont3 in the Cydia Substrate using iCleaner Pro. The phone immediately rebooted then went into Safe Mode. Mistakes were made: I got distracted and instead of removing all tweaks that might be causing the Safe Mode, I instead tried to jailbreak my device. Yalu wouldn't open, so I uninstalled it and attempted to side-load it using Cydia Impactor. For some reason when I tried to install Yalu, Cydia Impactor gave a Locked_Error. I then decided to [edit] force restart and the device did not boot back into Safe Mode. The problem: Now when I power up the device, it reaches the Apple logo for about 60 seconds then turns itself off. Details about device: iPhone 6s+, Yalu iOS 10.1.1 Questions: 1) Without the Yalu app installed, is it still possible to get into Safe Mode? 2) Is there a way to save my Jailbreak? 3) If I can't save my jailbreak, is there a way to save my data?