Briefly:
** Don't feel down. Learning to write is like learning a language or learning to play the piano. It takes YEARS. You wouldn't pay to listen to a piano recital by someone who'd only been playing a couple of years.
** The best advice is to read and write, but there is a little more to it. Find authors you admire and study their work. Notice every detail in what you're reading. How does the author use verbs and manage flashbacks and structure dialogue, etc. This will be a billion times more useful than reading "how to write" books.
** Writing is very hard at times. This is a personal opinion, but I don't think you're doing it right if you aren't struggling. If you aren't struggling you aren't pushing beyond your comfort zone; you aren't stretching yourself.
Good luck!
Coragem.