Hello there Mickey,
When it comes to learning new things there is never an age limit or a wrong time.
I spent my entire life up until my second year of college studying art. I had played around with my family computer and knew how to use it. I was tech savy but didn't know how to build a computer let alone program a website or an application. My guidance counselor suggested that I go and try engineering since I was afraid that art might not be able to provide a living. So, in my second year of college, I switch majors and jumped head first into a computer science degree because I liked computers.
Today, I have been programming professionally for nearly ten years and it was the best decision I have ever made.
The point of this story is that there really is no wrong time. Some will say yesterday or now or ten years ago. While not wrong, that can make it seem like you missed the train to success. What is most important is having a passion and drive to stick with the learning if it is something that you want to do and enjoy.
The only other challenge I want you to be aware of is the breadth of knowledge that is out there. It can be scary because usually the hardest part is taking the first step. I constantly get asked, should I start learning with Ruby or Python? Should I try to make an app? Which is easier to get started with? Where do I start?
There is no wrong place to start, all that matters is that you start when you are ready. Try to find something that sounds interesting and embrace what make you happy in it.
You can always change your mind and try a different language or framework. The beauty of all of this learning is that it is all connected with similar underlying ideas and constants. All experience in this field is useful. You can learn how to make phone apps, web apps, computer OS specific applications, etc. The amount of knowledge out there is vast and intimidating but stick with it and try new things, switch up languages, find things that you like and explore them. You will retain knowledge and get better experience when you go out and learn things that you are interested and can be passionate about.
I hope that this helps you take the leap into this huge wide ever changing world of really cool and fun stuff to learn.
Never stop moving forward in what you love.