I dont know what your plans are, and Im not going to be one of those people that insists on college, but it is an option.
Now that is out of the way:
I was in a similar boat to you, worked on computers, fixed them for people locally, built my own, etc. In addition, I was (am) a prolific poster here on the forums during that time. Since I enjoyed it I went to college for computer engineering.
As you can see by my signature, obviously thats not what Im doing now. I hated it. It was nothing near what I expected or what I wanted to do. So I went with my other passion and am exponentially happier. This hasnt stopped me from working on PCs or posting on here helping people out.
Take a look around at programs locally or at some other school potentially. Look into some basic online coding classes (free if you can). Note: If you plan on just doing hardware work, like I did, you will be sorely dissapointed with the track you have to take.
If you want to do something in the professional field in regards to designing electronics, well, how good is your understanding of math and physics?