懂得自愛, 才能去愛? 英文怎譯?

懂得自愛, 才能去愛
你的翻譯的意思是「首先，你應該最愛自己，之後你便能愛他人」，大致意思上是能表達到的，但欠了「懂得」這個意思。另外 people 已是 plural 了，不需要加 s；first 和 then 兩句之間用 full stop（.） 比較好。

我會這樣譯：
You need to know how to love yourself before you can love the others.
在你愛他人之前，你要知道如何自愛

If you do not know how to love yourself, you will not be able to love the others.
假若你不知道如何自愛，你將沒法去愛他人

Knowing how to love one's self is essential for anyone who wants to love the others.
對任何想愛他人的人來說，懂得自愛是非常重要的

One's love for him/herself is the basis of his/her love for the others.
對自己的愛是對他人的愛之基本



我要活得比你好
意思上是「我需要讓我的生活比你的好」，表達到原意，唯獨是多了「需要」這個意思，「要」在這裡是指一種「渴求／會」而非「需要」。

我會這樣譯：
I would live a better life than you.
我會比你活得更好

I would never live a worse life than you.
我不會被你活得更差

My life would be better than yours.
我的生活會被你的好

Even if I am going to live a bad life, it will never be worse than your life (OR it will always be better than your life).
就算我的生活將會是很差的，但它也不會比你的生活差（或 但它也會比你的生活好）


希望幫到你。

翻譯除了意思表達相同外，文理(格式)和意境也最好相若。

懂得自愛, 才能去愛
這句已產不多成為現代諺語，所以翻譯不是解釋/詳述當中的含意，只需要點出字面上的對比關係，由讀者自己去感受如何去learn(學)「懂」和able(「能」) to - 愛：
Learn to love yourself, then able to love others.

我要活得比你好
是決心或自我鼓勵的話，所以用了堅定的我和面對將來的動詞：
I am going to have a better life(或living) than you.

雖然內容上實有點咀咒感，但原作亦有這意思吧。
當然用簡單一點的寫法亦可以：
I am going to live better than you.

懂得自愛, 才能去愛
First You should love yourself best, then you can love peoples.
You ought to know how to love yourself before loving others.

我要活得比你好
I need to keep my life better than you.
My live is always better than yours.

懂得自愛, 才能去愛
You have to loveyourself first before learning to love others.

我要活得比你好
I will live a moredecent life than you do.

Give you another answers:-
(1)First you should love yourself best, then you can love peoples
---Know how to love yourself best first, then you can love others.
(2)I need to keep my life better than you.
---I would keep living a better life than yours.