it was really the decisions I made once 此句怎么翻译

it was that 强调句 ,可以省略不看.
the decision （I made once I arrived) made my college experience what （I hoped It would be）
这个决定使我的大学经历如我所愿
what （I hoped It would be）应该算 宾语从句.
再问： I made once i arrived 怎么讲