Does this make since to say? 그리고 오늘 전녁을 가든에서 제레미과 먹겠습니다. Does this make since?

Which one is right? 당신은 사과 먹어요 당신 사과 먹어요 당신이 사과 머어요 당신은 사과가 먹어요 당신 사과가 먹어요 당신이 사과가 머어요 can i use all six? which one would you use to just state the you are eating an apple; what does each mean :b

안돼 Vs. 아니/아니요 Are 안돼 and 아니 interchangable? do you use one more than the other, are they situation based? :v

How Can I tell The Diffrence Between These Three D: 진짜, 정말, 그래요. I heard that 정말 Is Like "Your Speaking That correctly" or "You Are Telling That Correctly" and 진짜 Is Like Its REALLY Or it is true; and 그래요 Is Like 진짜 and 정말 But Together and formal :v am i correct or can i use 잔짜요 or 정말요 which mean diffrent thing than 그래요 completly.. PLEASE TELL ME IF I AM RIGHT ABOUT THIS OR WHAT IS THE DIFFRENCE :"( i am very hesitant now to use these three words/ phrases!

First notebook entry: Introducing myself 안녕하세요! 한국말 조금만 알아요... 한국말 배우고 싶어요:)