After poking around a little, here’s what I suggest:
1. You can sculpt it. Take a plane, cut it in half and use the mirror modifier, get the rough shape, then flip on sculpting mode and sculpt without the holes for right now. Once you’re done with that, use a combo of array modifiers and boolean modifiers to cut in the holes. Then you can either use a solidify modifier or select the whole mesh and extrude out a little. I would separate out the eye pieces from the rest of the mask and snap them in after printing. Then go back into sculpt mode and clean anything up.
2. You can mesh model it with similar steps above, but instead of sculpting, you’re mesh modeling.
If anyone else has other suggestions, feel free to add them!
