Hi,
If you are trying to learn C, I just told that you have made a great dicision, as C is the strongest, most common programming language, which is the basis for many modern programming languages used today, such as C#, Java, Objective-C, C++ and more.
My over 20 years experience in programming, says that the best way to learn a programming language, is reading books. For you to get started, I recommend a book which is designed with a new coming student in mind. These books are written as a text book and have serveral simple exercises to solve. There are many books like this on the market. The first book I have read on C programming, was Teach Yourself C, from Herbert Schildt. I am sure there are many good, and may be better ones out there, but you should know that Schildt is the author of best selling programming titles in the world.
I am also an author and trainer, currently working on a web site to be an academic place for those interested in the C family of programming languages, specially C++, Objective-C and the C itself. You may now that Objective-C is the programming language of choice of Apple. But programming in Objective-C requires a good understanding of C and object-oriented programming concepts. In other words, programming for Apple devices and writing good quality code, is not possible without being a good C prgrammer in the first place. I am trying to bring my 2 decades experince to the web for those people like you.
Anyway, I am here and will be happy to answer your questions if I am able to do this. I hope this helps.
Good luck
Mani Ghasemnia Hamedani