I don't have any race mods, but for something like that, check for reported bugs carefully, be wary of outdated versions, and expect wonky interactions. I've seen a lot of SS of whispers of the divine, that one might work reasonably well, but I imagine it's not compatible with all armours, so you'll also want transmog enhanced, which means you want script extender, and so forth. Be careful not to end up with a massively overstuffed mods folder. Also install all the prerequisites, you might end up with unexpected consequence otherwise.
Be up to date with compatibility issues between mods. As an example, for reasons beyond me, lots of people like the custom Tav mod, but most mods that also change the in-game models despise it. You more or less need a special version to have both. Eyes of the beholder is another problem child. Assume neither is compatible with anything unless explicitly stated. Similar issues may crop up if you install a long list of race mods. Additionally, experiment with the loading order if anything breaks.