Understood. I'll try my best. I do understand the premise of these principles in actuality but I've always just somewhat grasped the basics of these natures with how they relate to the Narutoverse and the RP, but I'll at least detail what I know as far as that goes.
To start, Yin-Yang release (or "In'yoton") is the obvious conjoined functionality of its two halves, Yin and Yang. These fundamental natures are the basis for all known utilization of chakra, which promotes the understanding that not only does all of Ninjutsu as a whole stem from and is rooted within Yin and Yang, but even among the basic five elements, all who are capable of chakra manipulation at its basics is fundamentally utilizing Yin-Yang in some fashion, albeit in a near passive manner that isn't explicitly intended by the user.
Of course while Yin and Yang are treated and regarded as "two halves of a whole," they are anything but lacking in independency and can easily be regarded as wholes of their own. Yin Release (or "Inton") is the extension and prospect of spirituality as an energy form as a broader concept, while it can be regarded more specifically as being the fundamental basis for imagination, the void or the absence of physicality as presence, the mind and creation from nothingness as a whole. Because of this, Yin release is regarded as being the working energy that functions as the foundation for all interactions that pertain to abilities such as Genjutsu and its likeness, and even the Yamanaka and Nara's trademark clan techniques as they are fields that relate to and manipulate the mind and darkness.
On the other hand, Yang release (or "Yoton") is known for being the polar opposite from its counterpart, Yin. While Yin release deals in spirituality and nothingness, Yang release governs and operates as the foundation for physicality as both a presence and energy on the broad end, while expanding into that of light or illumination, and the body, along with life and vitality. Because of this understanding, Yang release is known for being quite boisterous in how it manifests, often being shown to reflect the capacity for imparting "life" or sentience upon things that would otherwise lack such to begin with, or to merely grant and sustain life as a manifestation, such as wood release, or to fend off harm and even death.
Of course it goes without saying that to master either of these energies is regarded as a feat of its own, but to achieve synchronicity through Yin-Yang is deemed as being the height of a Shinobi's capacity in comprehension and usage of chakra.