How would I go about creating methods for objects?

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Absolutely! While it isn’t supported by default in lua, there are some tricks

Link to full article: (Suggested Read) All about Object Oriented Programming - Resources / Community Tutorials - DevForum | Roblox

Here is an example:

local Car = {}
Car.__index = Car

function Car.new(carColor)
    local self = {}
    self.color = carColor
    return setmetatable(self, Car)
end

function Car:GetColor()
    return self.color
end

local carObj = Car.new("blue")
print(carObj:GetColor()) -- Returns blue