Heyyo- Nice edits so far.
I feel the arms themselves feel alright, however the hands are way too small to convey the perspective you're trying to illustrate.
(Minor thing i noticed about the arm on the left, it looks a tiny bit thinner than her other arm)
Side note: Not a necessary change but a suggestion nonetheless; In the GIF you're referencing, the girl has her arms touching her sides, whereas here its got a spacing. The arms here still look good and natural, but that was just something to point out :p