Hello ! If you are creative at photohop then it's very easy for you to become a logo designer. Spend more time in photoshop. And google the tutorials . Best of Luck
Get a book on color theory and then study the greats like Paul Rand and Saul Bass. Learn about your client and what they do - learn their market and their audience View their competition Get some inspiration Start to draw and sketch out your logos Send your clients the sketches and get feed back Rinse repeat till they're happy Design in illustrator The pen and paper still reigns supreme.
Logo designers often agonize over the creation of a defining symbol for each of their clients. A logo designer needs to look at symbols of competing companies as well as past client logos to generate a unique logo. You need to be aware of the challenges of creating an original logo before you become a logo designer.
You have to be good in Illustrator as this logo must be in vector file, as much as possible no shadow make it simple but conveys strong presence and easy to remember. Think about McDonalds simple and easy to remember.
Just read something about it, check out some logo galleries to get an inspiration (logopond.com, logospire.com, creattica.com..) and then its all about practising and years of experiences..
creativity is very important for a designer. there are lots tools available for logo design but you have apply your creative seance.