W, должно быть похоже, да. Но все же, попробуй это: while pronouncing УУУУУУУУУУУУУУУУУУУ with round lips, stretch your lips sideways and slightly open. Or try to pronounce mmmmmmmmmmmm, then just open your lips, actually it's gonna be something like мммммммммыыыыыыыы. To practice syllables try БА БО БУ БЫ БЭ, МА МО МУ МЫ МЭ and so on with syllables which seem difficult to you. Make the vowels sound long. As i remember in kindergarten we had cards with different syllables. So at first you learn how to read every syllable, then you combine them in simple words like ЖА БА, ЛЫ ЖИ etc. I think this way could me easier than if you'll practice whole words.

Practise your Russian, sound [ы] - YouTube - practicing Ы
Азбука-малышка. Буква Ы - YouTube - crazy owl talks about Ы (word examples with pronounciation)
Ирина Денисова - YouTube - логопед рассказывает про согласные.