

How can I fill this mesh that it makes sense? (3D Print)
(Bad English down below, not first language)
Hey Everyone!
I want to create a Figure Stand for my Anime Figure and for that I want to create decorative pieces like these wings here.
It's been a while since the last time I used Blender (Learned Game Art in School where we had to use Blender to create 3D Models but I always kinda sucked using the software) so I am not the best when it comes to all the tricks and right ways to do stuff.
I've traced the overall form with Polygons because I want to create the border that will stand out/raise out of it but now I struggle SO MUCH in filling out the mesh in order to continue.
Does anyone have any tips/hints on how I can do that? I don't really think clean Topology is important because it's not meant for UV/Animation or Game Development so i just need that space to be filled up with topology in one way or another.
Thanks so much for any help!