Let's get the bad out of the way: Writing is tough. Not that it isn't fun, but it's not an easy process and even if you finish a book or two, it's certainly not easy to get published. But if you love to write then you write. And if at first you don't succeed, try, try again.
And here's the good: You can write whenever you want; you don't need any special equipment, you don't need a partner, you don't even have to get dressed. Just sit down at your computer, or whip out your favorite notebook, and start writing. All you need is motivation and inspiration.
Maybe you started writing in your youth, without success. If you gave up back then, but you still love writing, then get back to it. It doesn't matter how old you are.
If you need inspiration check out this post from one of my favorite writing sites: Live, Write, Thrive
about late-blooming writers (of which I'm proudly one).