I am learning Serbo-Croatian: 'Listen, Repeat, Speak' language learning course

I am learning Serbo-Croatian : 300 essential words and phrases, 140 common expressions, the 100 most common verbs, the 1000 essential Serbo-Croatian words. Serbo-Croatian also called Serbo-Croat, Serbo-Croat-Bosnian (SCB), Bosnian-Croatian-Serbian (BCS), or Bosnian-Croatian-Montenegrin-Serbian (BCMS) is a South Slavic language and the primary language of Serbia, Croatia, Bosnia and Herzegovina, and Montenegro. It is a pluricentric language with four mutually intelligible standard varieties. It is spoken by 21 million people. How to learn a language differently ? Today, language learning is revolutionizing : you do not have to go to traditional language classes anymore. Our learning method : a selection of hundreds of phrases and essential words. You listen to them, you repeat them, and you speak. We rely on pronunciation, oral rehearsal, listening, combined with words, essential phrases, and a vocabulary list. 20% of the words are used 80% of the time. The end goal is to get a sufficient level in one language to be able to hold simple conversations, to be able to understand simple exchanges, deal with with everyday life and start exploring the new culture that opens up to you.