[unimportant]

Memorize the 2000 or so most common words via spaced repetition with Anki or Super Memo using pictures.

Learn the grammar.

Start reading simple books / websites about stuff that interests you, accompanied with a dictionary website, as you'll need to look up a shitload of words.

Once you can read well enough, interact with people via forums or web chats in the language, which will improve your skills further.

If you want to sound like a native you'll need lots of speaking practice until your brain adapts.

Some people will sound like Arnold Schwarzenegger for life though.