LG K7 phone setup keeps showing error message repeatedly, keyboard won't appear, etc? please help!

So I've had this phone since 2016, which might be why it's a bit glitchy aside from the fact that it's quite a sh**tty phone to begin with. Recently I've been running out of storage and there was nothing I could do about it so I decided that I wanted to wipe my phone, reset it so it could work a lot better, and plus I'd have storage space again. I didn't factory reset it though, I backed up my data into my internal storage (yes I know, it serves no purpose if you reset it). So he process didn't take too long, it was successful but then the minute I put my phone back on to type my password in, the keyboard wouldn't appear at all. It does this a lot but usually it comes back once I restart my phone, this time I didn't. No matter how many times I tried. I tried literally ever solution on the internet, like actually using the keys to factory reset my phone (that worked), but not completely because when I tried to set up my phone, an error message that said something had stopped wouldn't stop popping up (Unfortunately, com.tmobile.pr.mytmoble has stopped), literally could not type in the wi-fi password because of it. I couldn't try anything anyway since my keyboard STILL was not popping up. Please help, I really don't know what to do. I've tried everything at this point!