Auto-Fitting ImageLabels to Frame boundaries?

Hi everyone, I'm starting development of a card game, and I have used the following code in the command bar to fit 22 cards (ImageLabels, with offset sizes of 85 by 120) into the boundaries of a Frame, keeping a constant spacing between the cards:

for i,v in pairs(game.Selection:Get()) do v.Position = UDim2.new(v.Position.X.Scale,v.Position.X.Offset,(0+(0.0355*(i-1))),0) end

Here is an example of what Player 1's hand looks when using the following code, and here is an example of what I'm trying to achieve.

Now, I want to be able to keep fitting more cards into the Frame, as opposed to making a cap of 22 cards in a hand (so that the cards in the hand don't go outside the screen), but I have no idea how I would do this.

I am currently creating a card handling script to handle the loss/gain of cards of a player, and I am thinking of using the ChildAdded and ChildRemoved events to try and keep sorting the cards as new cards come in or as cards are played.

My question(s):

So I have multiple questions to ask, so I'll put them in a list:

1. How would I be able to position all the cards so that all the cards will fit into a Frame, keeping a constant spacing between them?
2. What is the best way to avoid duplicate cards? (I am thinking of generating an identifier value for all of the cards and compare them to a identifier value in a table consisting of all the player's cards.)

Sorry if what I'm asking is too hard to understand, I'm just beginning to develop the game mechanics as I type up this question.