Metatables and Metamethods? [closed]

Hi everyone, someone on the Scripting Helpers sub-forum on ROBLOX helped me with a card class script for my card game and this is what I have from modifying it so far:

cardTypes = {
    ["0"] = {0,0},
    ["1"] = {1,0},
    ["2"] = {2,0},
    ["3"] = {3,0},
    ["4"] = {0,1},
    ["5"] = {1,1},
    ["6"] = {2,1},
    ["7"] = {3,1},
    ["8"] = {0,2},
    ["9"] = {1,2},
    ["DrawTwo"] = {2,2},
    ["Reverse"] = {3,2},
    ["Skip"] = {4,0},
    ["Wild"] = {0,0},
    ["DrawFourWild"] = {1,0}
}

cardColours = {
    ["Red"] = "rbxassetid://184598259",
    ["Blue"] = "rbxassetid://184598232",
    ["Green"] = "rbxassetid://184598240",
    ["Yellow"] = "rbxassetid://184598224",
    ["Wild"] = "rbxassetid://184598210"
}

Card = {};

function Card:new()
    local nCard = {colour = "rbxassetid://184598259", offsetX = 0, offsetY = 0, player = nil}
    self.__index = self
    return setmetatable(nCard, self);
end;

function Card:SetColour(Colour)
    Colour = Colour or "Red";
    self.colour = cardColours[Colour]
end

function Card:SetType(Type)
    Type = tostring(Type) or "1"
    self.offsetX = (cardTypes[Type][1]*174)
    self.offsetY = (cardTypes[Type][2]*236)
end

function Card:SetPlayer(Plr)
    Plr = Plr or nil
    self.player = Plr
end

I would like to know how I would insert the data from the Card:new() function into the Card table so I can use it for setting values when creating a hand for the player in a later part of the script. I was thinking of doing the following, but I'm not sure whether or not to put in self or nCard.

function Card:new()
    local nCard = {colour = "rbxassetid://184598259", offsetX = 0, offsetY = 0, player = nil}
    self.__index = self
    table.insert(Card,self)
    return setmetatable(nCard, self);
end;

Any help is appreciated, thanks!