Hmmm....try to double check the grammar^_^ If you use 을/를 that means that whatever is attached to that is receiving the action..for example the sentence says " 나는 당신을 좋지않은" ...좋지않다 means "to not like" (the "다" ending is just the infinitive of the verb) and 당신 is a very formal and polite way to say "you" so you have 당신 attached to the 을 meaning that 당신(you) is receiving the action of being "not liked" and the word 한글 is the name for the Korean writing system but you can't use it with 에 because that is only used for locations..for example "저는 한국에 가고 싶어요" (I want to go TO Korea) ....I hope I helped a little bit! ^_^

어디에//어디에서.....the first is "where at" and the second is like "from where"..you can check out the website "Talk To Me In Korean"

For this case "고 싶어요" is just a verb ending "고 싶다" for expressing a want to do something. And when "하다" is involved it just means "to do"..공부하고 싶어요" "I want to do study" or "I want to study" when using it as a connector, 하고 means "and"