I screwed my first rooting.

[AC Question]

I rooted my phone, a motorola moto g 2nd gen (titan) by first unlocking the bootloader through the official site of motorola and then by flashing TWRP recovery and supersu. Now to install the lineage OS I downloaded the official lineage os and gapps of stock 7.1.1. I successfully flashed the rom but couldnt flash the gapps. accidently i wiped out all my data including the supersu and my google os. i am only left with the lineage os and twrp recovery. i also formatted my sd card to internal and again to portable thus erasing my data on sd card. i feel really deserted without my phone. i dont wish to take my phone to any service centre and d whatever to regain normal functions with lineage os and google apps. please help me as soon as possible.
thank you in advance