No you should also watch Japanese shows, listen to Japanese music, and read what interests you in Japanese if you’re into that kind of stuff. 
Four years ago I started off as a complete beginner with the first of the two levels of Assimil Japanese. I read through about 2 of those chapters a day and put a lot of words and phrases I thought would be useful on Memrise, and reviewed those on a daily basis. After about a month or two, I had mostly gone through about 3/4 of the book and Assimil got a bit boring for me, which is when I took on Lingq and stopped using flashcards bc there would simply be too many of them. If you’re complete beginner or you only know Japanese through anime, Lingq can be a bit of a hassle because it will feel like you’re lingqing every single word and an entire page of yellow can be overwhelming. So what I do is buy/cop a beginner book, read through most of it and review the vocabulary via flashcards/etc. then when you’ve developed the most basic vocabulary (especially important Japanese Particles like “ga”, “no”, and how to use them!!) go onto Lingq.