I think after seeing the picture that you should have an experienced reptile vet check her out. You can try looking in her mouth yourself, but one issue is that you really don't have a good baseline of what is normal because you are new to snakes, so you aren't going to be able to tell what is abnormal if you open it up and look. Even trying to get her to open up so you can get a good look without injuring her could be challenging if you don't have help and aren't really confident with how much pressure you can apply holding on to her and things.
I worry that she might have necrotic tissue in her mouth that needs to be removed, or that she might need treated for mouth rot. Her face looks a little swollen aside from the very dark scab, which alone could be an indicator of something pretty serious.