I'm not an overly talented seamstress. But normally I have no problem with those tasks. Except I really, really h*** to exchange a broken zipper. Especially in a heavy, lined winter jacket with a 72cm zip. I couldn't safe the broken zipper anymore (done my tricks before), and a replacement was due. And I h*** even more to throw away still good stuff and hubby loves this jacket too. Well the task is done now, and at least I see a picture in the unstitched zipper and I can say hurray, check task 1 (zipper replacement) + task 2 (photo of the day)!
I would probably have taken mine to the dry cleaner or a local seamstress. There are things that frustrate me so much that I would bugger them up more if I tried to do them myself. A very creative POV, like a snake slithering along the ground.
A zipper on a heavy jacket ... not an easy task at all! And not one I'd attempt as I don't think my machine could take the bulk. Anyway, good on you ... I hope it is successful, and I love this photo! So creative, as always!