If you have just the initial unwrapping in mind (not the symmetry painting:
Please note that the frontal project is vertical aligned (edges and Y-axis); the viewing angle will determine the result! Hence why I show it a few times.
Project file, before and after
I was unsure if you needed the symmetry paint, as you pointed to the thread with that specific question, or how to align a mesh.
Here are two screen captures.
Besides that, I would highly recommend going through Thanassis’ series about UV.
Yes, they are not directly for organic shapes, but the certainty you gain with those might be worth the time.
Does this answer your question? If not, please provide a scene file (Dropbox, Amazon, Adobe, Apple, Google, Wetransfer, please do not shorten the URL, thanks. I can also provide an upload link.)
Enjoy your weekend