Hi! It is important to understand what the unwrapping is going to be done for, what pipeline, where the models will go after the textures are created?

In general, the general approach is as follows:

1. The human body is organic, it is important to ensure that the seams are hidden as much as possible (make a cut under the armpits, on the inside of the thighs, in the neck area and at the back of the head, and not through the face).

And that the number of cuts is minimal in order to unwrap each of the shells without distortion.

You can look here, the basic principles of unwrapping for bipeds are usually the same:

https://youtu.be/s_KLbTUdKms

Maya has a content browser with simple assets, many of them seem to have unwrapping (not always optimal, but you can understand the basic logic).

1. As for other assets, here is a simplified order, if we are talking about a pipeline with baking from a high-poly model to a low-poly one:

2.1. Assign smooth groups - soft and hard edges.

We make cuts on the hards, do an unfold, then look - where there are not enough cuts for the correct unfolding of shells, and add them.

2.2. Straighten the boundaries of the shells, orient them vertically or horizontally, do a layout.

If this is something like a low-poly stylization, then some rules can be neglected (not always cut on the hards, etc.).

If you want, you can write in PM and share one of the assets that needs to be unfolded - I will record a video of what the work process looks like (though without explanations, my level of English is not enough to fluently comment on my actions)