Is it difficult to go to heaven?

No, Heaven isn't hard to get to.
The Holy Spirit has to drawl あなた to God, then あなた have to repent and ask God into your heart, God will atomatically come into your ハート, 心 and save you.
But あなた can't be saved on your own terms, the Holy Spirit has to 表示する あなた that your unsaved, that your a sinner and draw あなた unto God. How do あなた know He's drawing you? あなた just know, its not literally a voice talking to あなた but it is. Its hard to explain, you'll know when it happens. Trust me, あなた will.

Everyone always told me I'd know when it was God who was talking to my soul, and I did, and thank God I did! I hope I helped Hun....

If あなた truly believe in God and wish to serve him, あなた will go to heaven. Otherwise, あなた need to prove yourself to him. If あなた follow this, you'll be fine :)

Baptism comes after salvation, and if あなた don't get baptized, it won't keep あなた from going to Heaven. The only thing that will keep あなた from going to Heaven is unbelief. If あなた truly believe that ジーザス Christ is the Saviour and あなた are saved, then あなた will go to Heaven. The rest is good to do, it earns あなた rewards in Heaven, but it isn't necessary to get into Heaven. I hope I've helped あなた and haven't confused you. I pray you'll soon understand.