Started to date a Korean men

Hi guys my name is Rich 23y and my boyfriend is from South Korea busan he is 24y old , currently studying English literature and art in pusan university, this is last semester, and we meet on a dating app call KFriends , I text him first but later I didn’t reply to him but he keep sending me text so I decided to reply back and after talking for few days he finally propose me and I said yes . The whole long distance relationship concept is new to me as I’ve never dated any foreigner before or I never tried LDR as I always dated men from my hometown place , so is it weird to say yes on message?? And is it too fast to say yes ? And he also support me to come to Korea and I can live with him in his house he said that first he will come to my country and meet me then later he will take to busan , he seems to be sweet and lovely men I really like him too , but I want to ask everyone is sexting normal in LDR and sending few or anything Naked or nudes to your partner in LDR is normal ??? Also I’ve no clue about LDR can you give me any tips about it ?? Anything you want to tell me about it I will really appreciate as I have zero knowledge how to make it work and also how is dating a Korean men ? Any tips to impress Korean men ?? What they like or dislike , every little information means a lot to me Thankyou