He's going about it the right way. Always learn vocabulary first, grammar after. Without the words you cannot communicate at all. Without the grammar you will b

He's going about it the right way. Always learn vocabulary first, grammar after. Without the words you cannot communicate at all. Without the grammar you will be able to engage with a native speaker enough for them to correct you as soon as they get your meaning. Duolingo rightly postpones the grammar til later lessons and takes the right approach.