Koreans don't use latin letters, as the sounds of Korean letters are hard to be described in latin letters. We don't have the sound of 'f', 'v' and 'z' in Korean. So it is difficult to find Korean letters that exactly meet the sounds. With the same reason, it is difficult to find adequagte English letters for many Korean words. So it would be best to memorize Korean letters and their correct sounds and practice them reading only Korean letters not trying to write them in English letters. I hope my reply could be helpful for you. Thanks.

나는 가끔 약간의 한국어를 배우고 싶을 뿐이야.

I am going to take a bath.

Funniest memory/ies - 가장 웃긴 기억 is this right? ==> 맞습니다. 추가 내용: actually plural memories would be 기억들, right? ==> 맞습니다.

너는 나의 희망이야. or 당신은 나의 희망입니다. (more polite)

하나의 언어를 배운다는 것은 다른 세상을 보는 또 하나의 창을 갖는 것이다.

아침에 일찍 일어나야 하기 때문에, 우리는 일찍 자야한다.