Have you looked at the IELTS website? It has some useful information on how to prepare and has some sample questions.
When are you thinking of taking the test? I think it's possible to succeed without a teacher but you will have to work very hard on your own. You are going to need grammar books and exercises and I suggest you make good use of all the resources on this website.
If you look at the amendments I have made to your original post you will see that there are several areas you need to work on already. There are some very basic errors (for example, you did not capitalise "I" at all in your post). You need to make sure you are confident with the absolute basics of the language before you attempt to take a test, I think.
Please don't be disappointed or disheartened - it IS possible if you are prepared to work very hard alone and spend some money on books etc.