I decided to learn Spanish, just for fun.

我决定学习西班牙语，只是为了消遣。

《牛津词典》

I decided to learn Japanese just for fun.

我决定学日语只是为了好玩。

《牛津词典》

As a university student, I decided to learn German.

作为一名大学生，我决定学习德语。

youdao

So I decided to go back to learn to become a teacher,

我决定重新学习，如何当老师，

我的梦想是当教师 - SpeakingMax英语口语达人

Which is why I decided to learn more about their plight and our nation's legal and social response.

CNN: Don't turn your back on these children

My background was in Trading Systems for banks, so I decided to learn about GPS, how to programme a mobile phone (smartphones were just appearing then) and developed a server to hold the parking regulations and geographic data taken from a couple of enlightened authorities.

BBC: Parking - Your Thoughts

Because I had dropped out and didn't have to take the normal classes, I decided to take a calligraphy class to learn how to do this.

WSJ: Steve Jobs: 'Find What You Love'