Good job.
On the sd card, copy contents on it to a pc using a usb cable and then wipe the sd card in twrp. Then reboot your phone all the way. Go to playstore d/l sdfix app and gametheorys recovery rebooter. Reboot all the way again then Reboot to recovery, do a backup to your externel sdcard and when done, restore your saved data you want from your pc.
Cheers, merry xmas