A translation

For what it's worth, it's never too late, or in my case, too early, to be whoever you want to be.
There's no time limit, start whenever you want.
You can change or stay the same.
There's no rules to this thing.
We can make the best or the worst of it.
I hope you make the best of it.
I hope you see things that startle you.
I hope you feel things you never felt before.
I hope you meet people with a different point of view.
I hope you live a life you're proud of.
If you find that you are not,
I hope you have the strength to start all over again.

Not bad a translation.

无论是想成为什么样的人，只要有意义，那就永远不会太迟或是太早。

No matter what kind of person you become, if there is sincerity, it will never be too early or late.

这个过程没有时间的约束，只要你想，随时都可以开始。

This process has no time constraints; only when you want it, start at any time.

要选择改变或者保持现状都无所谓，这件事情本来就没有必然的法则。

No need to choose whether to change or remain the same.  This does not have any rules to it.

我们可以全力做好一件事却也可以把它搞砸，
We can muster all our strength to make it best or make it a failure.

我盼望你能活出最精彩的人生，
I hope that you are able make the best in life.

我希望你能见识让你惊奇的事物；

I hope that you can experience things that make you wonder

我期待你去体会从未有过的体验；
I look forward that you will experience things you never had experienced before.

我认为你会遇见其他与你观点不同的人们；
I deem that you will meet others who have different view points.
我相信你能有一个值得自豪的一生，
I believe that you will have a worthy life to be proud of.
如果和你想象的生活不一样……
If you and life's ideals are not the same...
我希望你能有勇气，重新启程……

I hope that you have the courage to start the journey once more. [I like yours better, "start all over again"]