Welcome to Build-ruary that mirage looks like a great first build-ruary build.
Sharp blades helps along with metal rulers. (I prefer aluminum yard rulers).
Amazon has a 100 pack of #11 blades for ~$18
As for weak wings, like they snap/open up in the middle, bottom or top? or are the tips... droopy?
I often will use stranded fiber packing tape tight across the bottom
I find cutting the parts out Soothing, like a meditation.