Hey all! this is my first forum posting so excuse me if my formatting is a little weird lol, I've been lurking around these parts for a while now without posting anything.

Anyways, I need help in seeing if this character is viable in terms of... lore I guess? The concept so far: An awakened human man who's either a regular - or mystic - adept skilled in thrown projectiles and knife fighting. He'll probably end up leaning towards the role of infiltrator/ face as I don't see him wearing much armor at all or using any sort of firearm other than maybe a light pistol. (but I dunno, maybe the whole- light pistol + throwing knives thing is a little redundant)
So far there's nothing really unusual, I know, but I just wanted to get the basic concept out of the way.

The parts that I'm unsure about involve the way this character perceives things astrally and how this character would (potentially) cast spells. First up is the astral perception-thing: So in order to make this character a special snowflake, I had the idea that one of his eyes would be a normal eye with 'mundane' vision and the other would be black. The character would only be able to perceive astrally with the latter, though. I've thought about maybe giving him the 'dual-natured' quality so that perhaps he could use both eyes simultaneously and sorta 'layer' both perspectives on top of each other. However, it is from my understanding that the 'dual-natured' quality is unique to infected characters such as ghouls and I'm not sure if it would even apply in this situation. I actually think that a character with the ability to perceive both planes simultaneously would be at a disadvantage due to his mind trying to process the two. Maybe the character would suffer a penalty to perception tests similar to the way one with more than 3 eyes would, due to to the excess of sensory information.
Another way of doing this would be that either eye would roll back into his head while the other is being used, sorta like a way to switch between perspectives. I would imagine that in
this version the character would always have a handicap no matter what due to the fact that he would only see out of one eye at a time. And next we have the spellcasting part: This character has two cybernetic arms that attach right above the triceps to his flesh-body. And I like the idea of pitch-black pigmented ortho-skin covering his arms due to the contrast. But more to the point: since the character has a pair of cyber arms he would obviously take a hit to his essence but that's ok because I don't really intend to make him super efficient. My question is that if I decide to make him a spellcaster, would the fact that he has cyber arms hinder his ability to cast spells?
My understanding of the way magic works is that you need
line of sight or be able to see your target to cast the spell. (or most spells) But, I have also heard of magic users drawing 'signs' or runes or whatever in the air with their hands to cast spells as well as sight. I don't know if having cyber limbs would effect the casting of spells any more than the general loss of essence would, or even if it would at all, but I thought this character's solution to not being able to use his hands in casting would be to use -well -his feet

He would pretty much do the same thing as he would with his hands but except with more exaggerated movements. And I thought that maybe he could be a practitioner of Capoeira and combine the spellcasting part of his footwork with the unarmed combat portion of a martial art. One that focuses on deception and the concealment of your strikes and such, so in other words it would be perfect to conceal his casting movements in combat to the untrained eye

So basically what I'm asking is:
a) how would you guys go about the whole- each eye sees a different plane - thing? what penalties would you think are appropriate? what qualities? would dual-natured apply? etc.
and
b) Do spell casters need to have flesh-and-blood hands/arms to cast spells? is the drawing of symbols in the air an actual thing? - is it necessary?
I look forward to any responses

and sorry, I know I'm a little long-winded

but if anybody wants to hear more about the ideas i have for this character or whatever I'd love to tell. And I could also throw this character together in chummer and post it as well. Thank you.