It is best to speak to natives or watch youtube video and movies in Russian. You will pick up on more words faster than flachcards. And use them rather than trying to remember a flachcard. Flachcards are passive and harder to remember. I did it for the longest time. Just have fun on youtube and watch Russian vines or movies. I learned way faster doing that because it evokes strong emotion, which was humor. So i recall it faster. If you hear a word a lot, look it up if you cant figure it out.

the first one from your is great , but i guess it is more great to native speakers then to foreigner . there are too much slang , expressions are too colorful . but yes , i am agree they are really good

Слушайте русское радио, это лучше всего!