Its mostly fine if you want you can read the wiki if you don't care about potential spoilers, but the setting will be mostly pre-grand order events with none of the canon cast included. NPCs and the enemies will be mostly pulled from other sources like Archimedes replacing Da Vinci as the tech specialist. So as long as one knows how fate works in general I think it should be enough for this setting. For magecraft you can just do something basic like say fire conjuration like fireball or whatever.