There are mountains of different things that I want to do, now that I am finished with the entrance exams!!
I have heaps of things I want to do, now that my entrance exams are over!!
ご質問ありがとうございます。
① "There are mountains of different things that I want to do,"＝「山のようにいろいろとしたいことがある」
"now that I am finished with the entrance exams!!"＝「受験が終わって！！」
② "I have heaps of things I want to do,"＝「山のようにしたいことが私にはある」
"now that my entrance exams are over!!"＝「私の受験が終わった今は！！」
ご参考に。
アメリカ合衆国 
