The first thing I would do is truly access the damage. Especially the frame, that fork is pretty stiff and the frame being a step through has less stiffness/strength to best survive a frontal impact. If the frame is bent then the bike's pretty much a write off by most peoples' standards.

Fork replacement involves a few critical dimensions and some that are less so critical but should be paid attention to. Steerer/headset dimensions are first, otherwise the fork won't even fit the frame. Axle to fork crown seat length will insure the OEM fender and tire will play nice and make sure the new fork has the mounting holes for the fender. Make sure the old stem will fit snuggly in the new fork. All this is easiest done if you can hold the new and OEM forks next to each other. Are there local bike shops there?

Again, check the damage first. No sense spending $30+ only to find a second issue you didn't catch first. Andy