How to Use the Korean Particle 만 and 밖에 ("only")

[@aashubel2867]

Very much thanks to you mam for working so hard on teaching us korean language which is very one of the most beautiful language ,i am studying

[@GehNa17]

서울에만 비가 와요🤗
고기밖에 안 먹어요🤗
세 시간만 잤어요🤗

[@yasaiasazuke]

오늘은 문법만 공부합니다.
Today I only study grammar.

[@dollygoswami1760]

How do we understand what he is saying in Korean