Iwant to learn korean but the grammar is what gets me. (i know a lot of the letters)

like for example there are 3 k's and i don't understand the differences and when you use them, same thing goes for g/k since they mean the same how do i know when a word is with a g or a k if they are represent by the same letter. let me know if there a some good clear websites for this as well.

What is the meaning of the word repent based on its context in this passage? charley knew it was his fault that the whole family had to cancel their winter vacation. it all started when he’d snuck out of his house and hid at his friend laurie's place. the whole family had spent the morning looking for charley all over the neighborhood. by the time they’d found him, it was afternoon. they had missed their flight for hawaii. now charley felt guilty for his actions. he approached his father to repent for his poor behavior. but his father would not listen to him and instead declared that there would be no vacation this winter.

One type of u. s. foreign aid is multilateral assistance. what is the best definition of multilateral assistance?

What misspelled word is in the sentence after sean wrote her letter she drew flowers around the border