Hope this helps, I'm going to keep this brief and just give loredumps for yourself.
TLDR: Shadow sect lore: Same as Light sect, except they got booted out out of the main Temple and forced into obscurity due to a disagreement over the royal house. Shadow and Light sect split is a political thing. Not an evil vs good thing. Also chakras don't make you behave you in a certain way as far as we know. Shadow sect and Light sect employ the same techniques. More on that in the links below.
Your chakras are aspected in both Light and Shadow sect side (probably Umbral and Astral, but that's a guess. Not lore). They are valves in your body, and Monks claim all living beings have them.
Sounsyy lore on Chakras and Fists
Chakra Lore
More Chakra Lore
Opening Shadow Sect chakras - Same as Light really
Anyhow, not telling you how to roleplay; seeming we both disagree massively on the way we roleplay our Monks to begin with, but hopefully it clarifies a few things for you regardless.
Best of luck.
TLDR: Shadow sect lore: Same as Light sect, except they got booted out out of the main Temple and forced into obscurity due to a disagreement over the royal house. Shadow and Light sect split is a political thing. Not an evil vs good thing. Also chakras don't make you behave you in a certain way as far as we know. Shadow sect and Light sect employ the same techniques. More on that in the links below.
Your chakras are aspected in both Light and Shadow sect side (probably Umbral and Astral, but that's a guess. Not lore). They are valves in your body, and Monks claim all living beings have them.
Sounsyy lore on Chakras and Fists
Chakra Lore
More Chakra Lore
Opening Shadow Sect chakras - Same as Light really
Anyhow, not telling you how to roleplay; seeming we both disagree massively on the way we roleplay our Monks to begin with, but hopefully it clarifies a few things for you regardless.
Best of luck.