Due to roblox’s documentation being the most spaghetti text there is, I can’t really make sense of :

cf = cf + cf.LookVector * n

If someone knows how to use look vector and can explain it like a normal person, that would be so greatly appreciated. I’m simply trying to put a part 3 studs in front of my character’s HumanoidRootPart.

The LookVector is a unit vector (a vector of length 1) pointing in the direction that the CFrame is facing. Multiplying this LookVector by a scalar n will extend the vector out in the same direction but n times longer. So, if n is 3, the vector will be 3 times as long as the LookVector . This operation cf.LookVector * n is creating a vector that points n units straight ahead from the current orientation of the CFrame.

honestly, i’m not too sure myself, but what i do know is that if you wanna get some distance in front of something, just do

local CFRAME = HumanoidRootPart.CFrame -- insert whatever CFrame you want here
local DISTANCE = 3 -- as usual, this is distance in studs
local result = CFRAME * CFrame.new(CFRAME.LookVector * DISTANCE) -- this here will be DISTANCE studs in front of CFRAME

ye, if you want a full in depth explanation, we will have to consult the rotation matrixes
my smooth brain cannot comprehend them, so for normal uses, this code block above works ig

How this works is that the LookVector is the direction the Front face of a part (CFrame?) is facing. Since it is a UnitVector, if you add it to another Vector3 / position the will position move one stud in that direction. You can multiply it to amplify this effect, leaving us with the code above. Which moves the HRP 3 studs forward in the direction the front of it is facing.

Thank you to all 3 of you, @au_tk, @NGC4637, @RipGobtain, I wish i could give all 3 of you the Solution tag since all of you helped me understand this and ultimately get it working.

No worries! I don’t really care about having the solution checked on me, but I do care about helping others and making sure they can solve their errors.