Hi welcome to the site, for you to start casting spells, you have to learn your basics. These include, visualization, energy manipulation, understanding magical concepts, and meditation. You can find more information and tips for beginners in the General Information forum, and Newbie Central.
Help the old lady to cross the street.. that's magic. And about spellcasting, if you don't learn anything let me know. And I will tell you later that it doesn't work. Just go and meditate and be good ;)
Also Mikkan123, Make sure you check out newbie central for some good articles written by members here, as well as the articles section, and the video's section. There is a search bar in the top right hand corner of the screen as well, which you can use to search out specific subjects. Really just read as much as possible, and learn visualization, the moon phases, etc... which were mentioned before and NEVER HESITATE to ask questions. There are a lot of knowledgeable people here on the site that will happily help you out.
When did you see she wasn't taking it seriously or saying it as a joke? Your teenage wisdom failed to realize that English appears to be a second language in this circumstance. Never mind that I've seen you make similar grammatical errors in the chat.
There are many posts in the forums that go over the Basics Mikkan. IF you have questions let me know (or anyone else who offered) and I'm sure I (or they) can help you out.
As a former Linguistics major at a good university I feel compelled to mention that the term "magics" is perfectly grammatically appropriate to refer to many different types of magic. It is an optional use of the plural that exists for many words. Fishes is another example. One fish can be either one single fish or one type of fish such as salmon. Many fishes refers to many different types of fish, such as a list like salmon, trout, cod and halibut. The word "magics" has the same use. You may talk about magic as in one spell, magic as in the magic of Wicca or many magics as in the magics of the world (which include Wiccan magic, Christian magic, Hindu magic, Chaos magic and many others).
Just to put things straight. Magics is perfectly fine for that usage.