你很早之前就決定要當藝術家了嗎，請幫我中翻英謝謝?

Did you decide to be an artist long time ago?
這樣文法才正確👍
did為助動詞，後面的動詞要原形
決定：decide to + V

你很早之前就決定要當藝術家了嗎?

Did you decide that you wanted to be an artist a long time ago?

你很早之前就決定要當藝術家了嗎
= Before long ago, an artist have you decided to be?

你很早之前就決定要當藝術家了嗎?

Have you ever decided to be an artist long while ago?

╭╮ .╭╮
. \ . \. /. /
╭　　　╮
│ ╮ ╭ . l
╰───╯

Did you decide to be an artist long ago?

Did you decide (that) you wanted to be an artist long time ago?

補充發問
我讀多媒體設計系，但我發現我對科系這沒熱忱

Did you make the decision to be an artist earlier ? 本句用过去簡單式即可 ，若用完成式表示持續動作，就無法使用earlier 了，

Did you long ago decided (you wanted) to be an artist (who practises one of the fine arts, especially painting., multi-media designing,drawings, etc.)