You can upload your book in a number of file formats but I recommend that you stick with PDF.  This is the format of encrypting (read – can’t be edited by others) a file which was developed by Adobe and can be read by either their free Reader or a number of other readers. 

While there are many places which will publish your book for you both online and off-line and many print on demand services there is still no guarantee that you will be able to sell any.

Many budding authors, like you, have tried and failed to make a success of the craft of writing and it usually isn’t their fault.

Most of you can write well, your ideas are good, your plots strong and flow well, the characters are well rounded and believable and the story you tell is engrossing.  Unfortunately none of those things are actually that important to selling well.