My advice would have been a combination of the 2 answers you've got already even before I read them. Try the pillow case trick and see if she is able to rub off the remaining pieces in the damp fabric. But if she can't, don't stress about it since there is so little left. Just get the humidity right, and she'll have a perfect shed next time, including removing any bits left from this time.
A good trick for people that have humidity issues and/or snakes that have shedding issues is to give the snake a humid hide as soon as you see them go blue. Any sort of enclosed plastic container (those ziploc brand food storage containers work well if your snake is the right size to fit one of their sizes) will work. Make a hole in it that is just big enough your snake can get in & out easily. I recommend making the hole by melting it with a soldering iron (or if you don't have one, hold a nail in a pair of pliers and heat it on the stove) instead of trying to cut with scissors or knife. I find it easier, and also much less likely to crack the plastic or leave rough edges. Then put in some damp sphagnum moss or damp paper towels, and put it inside the enclosure. Make sure to check it every day to be sure it remains damp and also that it isn't molding or that the snake hasn't pooped in it (they seem to love pooping in damp places). This allows them to seek extra humidity during their shed cycle if they need it.
As far as your concern that people would be rude, well, I can't make any guarantees for every single person that might post here, but I can tell you that as a general rule, the people on this forum are friendly and glad to help out new keepers who are seeking help. Good snake keepers aren't people who never make mistakes; no one was born knowing how to take perfect care of these scaly critters. Good snake keepers are people like you who care about the well being of their animals and so try to learn from their mistakes and eventually become the best keepers they can be. Welcome to the site and to the world of ball pythons!