In order to start writing spells or using magick, you need to learn the basics first. That includes meditation, visualisation, grounding and a multitude of other things. Go to newbie central to help you get started! Then read articles a d look around the forums.
No, the basics are not a "need" to perform magical workings. The basics is simply a list of recommendations that can help benefit new practitioners. Some practitioners say to just grab a sheet of paper and a pen or pencil and write down the intentions of the spell, items, instructions, and whatever else you think you need. Remember to be very detailed with the spell and intentions so you have a better chance of getting what you want out of it.
Here is a wonderful thread that may help:
Wiring your own Spells by SilverVixen -http://www.spellsofmagic.com/read_post.html?post=275190&offset=0