You now have enough to read a lot. Five more and you have almost the whole set.
ㄷ · d / tㄴ with a lid. Same tongue position, harder push.
ㄹ · r / lBetween English r and l. Tap the roof of your mouth once, like the “tt” in American “butter”.
ㅂ · b / pㅁ with the top opened.
ㅈ · jㅅ with a lid.
ㅎ · hA lid, a line, and an open throat (ㅇ).
Why “g / k”, “d / t”, “b / p”? Korean does not hear these as two different letters. The same letter sounds softer between vowels and harder at the start. Native speakers do not notice the difference — you will not have to choose.
ㄹ is the one to practise
It is not the English r, and not quite the English l. Say “butter” the American way and freeze on that middle tap. That is ㄹ.
연습 · Practice
이 레슨에는 풀어 보는 문제가 4개 있습니다. 앱에서 하나씩 맞히며 넘어갑니다. 4 exercises come with this lesson — open it to work through them.