How do you say "a while ago" in Korean? and how about "a few hours ago" and "earlier today" Thank you if you do help~

Can you help translate this letter to my friend? My Korean friend (I wont say who) just debuted in a group and I really want to send her a support message but these are the sentences I cant say in Korean and I hope you can help translate for me in formal language please this is a special occasion :c " What do I say ....... I've supported you way before you debuted and I will always watch over you for many years to come . I can't wait to see you perform more . (_____) will be really famous in the future I promise! Don't for get to eat lots of delicious food ok? I hope to see you soon "

How do you say this in korean? "Will it be through call or will they come to the door?" In formal language please, thank you!!

How do you say this in korean? " I didn't mean to " " We are both misunderstanding each other " " I am bad at telling jokes " " I will bake you a cake " In formal simple hangul please, If you translate these thank you so much in advance!!