While it's true that anyone can give tarot readings, they do require a lot of experience, skill and intuition. If you don't know what you're doing, you'll probably end up making an inaccurate and even completely wrong reading. Because tarot is such a complex subject, there are many different ways in which a reading can be done. It's up to you to try and find the method that suits you the best.
The first thing you need to know about tarot readings is that they are both an art and a science. Some people will use elaborate spreads and consult a number of charts when they make readings. Others will simply rely on a few cards - so which way is really the right way? There are a number of perfectly valid ways to read tarot. It is up to you to learn about the different reading methods out there and know what they are best suited for. For example, are you hoping to create and work magic spells? Or are you simply interested in doing a little basic divination?
After addressing these questions, you need to prepare your cards accordingly. Make sure they are keyed and that you have a signifier, if you choose to use one. Once this is done, you need to look into the kind of spread you want to use - the easiest and most common are the 12 Card and Celtic Cross spreads. The Celtic Cross reading doesn't give you a glimpse into the future - instead, it gives you a vivid picture of the person you are reading. This is an effective way to get a handle or profile of a person, animal or animate being.
12 card tarot readings are what are popularly used to read situations that involve more than one person. For example, if someone needs guidance on a business venture or marriage, using the 12 Card strategy would be the best option. If the Celtic Cross is like getting a snapshot of a person, you can consider the 12 Card method to be like a little movie - you will not only get an idea of the people involved but also what they are most likely to do.
This method is extremely flexible and you can in fact use multiple signifiers to get a detailed idea of very complex situations. This is also ideal if you want to expand a certain area of the reading or move into different areas of time. There have been instances where adept tarot readers have been able to use the cards in order to take a look into a person's past lives.
While each card does have its own name and area of governance, remember that it's up to you to try and understand its real inner meaning. Each card needs to be studied and handled so that you can get a good grip on the inner meaning of each card. The more in tune you are with these meanings, the more accurate your tarot readings will be, no matter what kind of layout you choose to use. Last but not least, remember to keep your tarot cards protected and safe when you're not using them.