Soft bricked my HTC ONE M7_UL (S-ON,HBOOT 1.57) Have access to TWRP

Evening,

I've been desperately trying to figure this out myself but I've concluded that it's too complex for me to go it alone, as it stands my HTC one M7_UL is I believe soft bricked, I can get to the bootloader and into TWRP recovery but I've had no luck with FASTBOOT/ADB, I can sideload a rom.zip but it just fails to do anything after 100%, I reboot it and it just gets stuck on the previous bootloop. Currently have no OS installed and honestly I don't have a clue what I'm doing, exactly why I'm in this mess in the first place, I bricked it a while ago but I figure I wiped system partitions and as a result am in a bad place any advice you could offer would be brilliant.

Thank you in advance, I've included some additional details below but let me know if I've missed anything.

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.57.0000
(bootloader) version-baseband: 4A.23.3263.28
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.20.206.16
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: FA39PWxxxxxx
(bootloader) imei: xxxxxxxxxxxxxxxxxx
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0710000
(bootloader) cidnum: O2___001
(bootloader) battery-status: good
(bootloader) battery-voltage: 4320mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-44d68d6b
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.070s

Also I get this as well not sure if it's a problem but I haven't seen it anywhere else -
C:\Program Files (x86)\Minimal ADB and Fastboot>adb devices
List of devices attached
FA39PWxxxxxx offline


C:\Program Files (x86)\Minimal ADB and Fastboot>adb devices
List of devices attached
FA39PWxxxxxx sideload

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