did you read the
Filezilla Documentation ?
did you click the
HELP >> GETTING HELP button in the application that takes you to
The Filezilla Help and Support Page AND start clicking and reading up on how to use Filezilla.
The first step in getting help is to use the resources that exist in the application and its website.
If you have any specific questions after you take some time and initiative to read and learn how to use it, feel free to post them and we can help.
Other than that, ftp is basically a windows explorer type drag and drop application that uploads the dragged and dropped files. On the left hand side is your local computer files that you have developed, and the window on the right shows the website account directory (folders) where you upload to. By dragging the ones from the left and dropping them in folders where you want them in the right window is how they are uploaded, only after logging in to your account though.