How does CFrame work and what are the functions?

The tutorials on the wiki are very bad and I don't understand any of it.

I know basic CFraming like how to rotate parts using CFrame.Angles I just want to learn more like CFrame.fromAxisAngle and how all those work and how to learn more about them. I really like CFraming and stuff like that but I don't know how to learn more. I see people using a ton of CFrame functions but I don't get how they learned it if the wiki shows bad tutorials on it and don't really go in-depth with it.

Can someone please explain briefly of what some of the CFrame functions do and how I could learn more about them?

I'd be happy to.

CFrame is a Roblox object that is used for many things, including teleportation and part movement (not Velocity). The function CFrame.new() is used to create a new CFrame object. Most of the time, CFrame is a Position (sometimes a Vector3) that is used for teleportation and such. In terms of teleportation, CFrame ensures that the Torso and its joints are teleported along with the Humanoid, like this:

x = math.random(1,255)
y = 1
z = math.random(1,255)
humanoid = script.Parent:FindFirstChild("Humanoid")
while true do
	wait(3)
	humanoid.Parent.Torso.CFrame = CFrame.new(Vector3.new(x,y,z))
	wait(1)
end

In terms of part movement, CFrame offers a sliding motion from point to point. Here's an example script of just that:

part = script.Parent
while true do
	for i = 1,20 do
		part.Position.CFrame = CFrame.new(part.Positon + Vector3.new(0,0,0.1))
	end
	for i = 1,20 do
		part.Position.CFrame = CFrame.new(part.Position - Vector3.new(0,0,0.1))
	end
	wait(0.1)
end

Unless you're interested in using Region3, that's all you need to know about CFrame.