I just keep thinking about how weird that time travel is... assuming the problem with her father is resolved and she does receive training and then goes back to the future at some point, will the swordsmanship skill of the "actual" kid Evie degrade? Will the instructor notice? I doubt it will be addressed though :P
She's most likely taking the long way to get back to the future.
Highly unlikely, considering that she already lived in that future before. For her to take the long way would mean for her to get stuck in an infinite time travel loop where she's constantly being sent back to stop the wolves, meets Elsa, loses the memories of the time travel and meeting her, goes through the story so far, and then starts the loop again. It's much more reasonable to assume she'll accomplish her mission, establish herself as Elsa's destined soulmate, and then travel back, leading to the current situation where Elsa remembers her from her childhood (as does Dahlia), but she has no memories of the time this future version of her was in control.