No OS problem

Hello,
I did recently update to Android 6, but I had TWRP so phone was bricked. I was tringing to make it works, but now i have no OS, only TRWP and HBOOT and no idea how to make it works.

I am not expert in this area so can you please tell me what to do. How to install OS and make it works. Detailes:

(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 01.01.010_U10305041_08.01.51015
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 2.11.401.6
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) meid: 00000000000000
(bootloader) product: a51_ul
(bootloader) platform: hTCBmsm8939
(bootloader) modelid: 0PFJ40000
(bootloader) cidnum: HTC__032
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: da038a09
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
(bootloader) mfg-name: 0001

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