You can learn the alphabet in 3 days or so. Don't be intimidated by the alphabet.
Netflix has some great Russian TV shows. Use these to get your ears tuned to the sounds of the language.
- The Sniffer
- Silver Spoon
I rewatch the series' with a notebook in my lap and I write down 2 things during each episode.
- Words I want to look up later
- slash marks for every word that I recognize based on hearing it
A good flashcard software is Anki SRS, and it is free. Combine that with forvo.com for audio files of each word you put in a flash card.
Use this to learn hundreds of common nouns easily.
How you choose to approach grammar depends a lot on your personality. If you are the type of person who enjoys puzzles, then dive in to the case system.
If it seems overwhelming at first, then save it for later.
The book "Fluent Forever" by Gabriel Wyner is the best approach to a flash-card system I think. Check it out. It helped me learn Spanish as well.