This is not just an average "where do i begin?" thread, although I am a complete and total beginner.

I'm a native and fluent American English speaker.

I was wondering if I should begin with Russian grammar and cases, and then, as I learn new words, I can place them how I want...

-or-

Should I start with word/phrase learning and work my way from there?

(Please don't post in Russian if you want me to understand your response)

Thank you for your help!