Requirements
To be able to do card reading you need to do some preparation. You need to take care of two things. First of all, you need cards. Card reading isn't card reading without cards, duh. :P Second of all you need a system on where to place the cards. Let's go into the cards first.
Famous Cards
The most famous cards used for card reading are tarot cards. This deck features 22 cards. Each of these cards features a completely different theme. The themes are[1][2]:
The positions share the following themes:
[1] https://en.wikipedia.org/wiki/Tarot
[2] https://en.wikipedia.org/wiki/Major_Arcana
[3] https://www.biddytarot.com/how-to-read-the-celtic-cross-tarot-spread/
Each card has its own meaning that is taken from what is represented in the picture. To be able to do card reading you need to familiarize yourself with the meanings of each card. Keep in mind that - as always - your own interpretation also plays a certain role in their meaning. It is very important to realize that you don't need to know the cards in and out but you do need your unconsciousness to know them.
I. The Magician XII. The Hanged Man II. The High Priestress XIII. Death III. The Empress XIV. Temperance IV. The Emperor XV. The Devil V. The Hierophant XVI. The Tower VI. The Lovers XVII. The Star VII. The Chariot XVIII. The Moon VIII. Strength XIX. The Sun IX. The Hermit XX. Judgement X. Wheel of Fortune XXI. The World XI. Justice
The System[3]
The system in card reading is the way you place the cards. Here each position where a card will be placed has a meaning. Multiple ways can be found all over the internet. The Celtic cross, for example, has a layout where you lay the cards like this:The positions share the following themes:
1. Present Perception, state of mind of the current happening and the happening 2. Challenge An immediate challenge, issue or problem that makes life harder 3. Past What lead to the present and maybe the challenge as well 4. Future What will happen in the next weeks or months; the next step on the journey 5. Above The goal, aspiration or the best outcome of the current situation 6. Below Underlying feelings, motivation, drive associated with the situation 7. Advice Takes everything into consideration and gives advice for the challenge 8. External influences Represents people, energies or events that have influence on the challenge (things where there's no control over) 9. Hopes and/or fears What is hoped for and/or what is feared 10. Outcome Represents the current direction the challenge or situation is taking
The Reading
Now that you are familiar with one way for the system and one deck of cards you could potentially do card reading already. To do this you mix the cards randomly - actually you can make the person whose future or fortune you want to read mix them, especially if they know the meaning of the cards and positions unconsciously. Then you draw a card and place it in the first position. You could stop here to interpret it as is, I think it's better to keep on going as not to mix up your conscious and unconsciousness during the reading. So, place the cards in order until you're done without thinking too much about it. Once you're done the meaning of the cards should be taken into the context given by the position as well as within the context of the relationship between each other. (What does the present show? Does the challenge match the present?). Then the result of that can be presented in the context given by the person to further clarify possibilities and details.
Breaking the Tradition
Maybe you noticed it by the way I wrote this post. You are not required to pick existing cards or an existing system. You can actually make your own. The only important part here is that you need to familiarize yourself enough with the meanings of the cards and positions. It helps to assign certain directions to certain meanings. Like for example having a card placed higher could mean older age, in the future, later in life or maybe a superior thought, idea or body part. You can see in the Celtic cross tarot spread that the challenge is placed on top of the present. These types of symbolism play a huge role in the system you use to place your cards.
To prove this to you I'm gonna give you an example and tell a story in the next and last fortune-telling post of this on-going post-series.
[1] https://en.wikipedia.org/wiki/Tarot
[2] https://en.wikipedia.org/wiki/Major_Arcana
[3] https://www.biddytarot.com/how-to-read-the-celtic-cross-tarot-spread/