Please ask for help on here, especially about the printing issue. I believe that you can solve this one quickly. So start a new thread. There are people on here that can really help you. As for Gnome, start another thread, and ask about that. I have been using Manjaro since 2012 and have been helped many times.
So, what kind of printer do you have? Start that printer thread NOW! This forum can help and I want you and your mom to start enjoying the software experience.
Sorry, I did not see your response. But give us a try, start that thread. My dear mother taught me a very old saying:
If you don’t ask, you will never learn anything.