I did not need a theory lesson to take a photo with my mobile phone, I just shot the photo half an hour ago. Clouds do not wait for theory and being honest, I was never a theory person. I learned how to play the piano and someone had to show me how to read the notes. Afterwards I had a teacher that decided to go into the basic theory of music with tetrachords etc. That was when I decided no thank you. I just wanted to play the piano
I am a “learning by doing” person. If I do it then I know how it works for the next time. Computer programmes are one big repetition. You are repeating constantly so you should get the idea eventually. It was the same at school. A new mathematical theory? The more you applied it, the easier it was. Of course after I left school my life was reality and not theory, so I just did it. What did I have to lose? I am still trying to understand the Swiss income tax form. Mr. Swiss gave me lessons and he showed me how well he can do it, so I admired his grip on the theory. Unfortunately I was not doing it myself, just admiring, so I never really got the hang of it. You can only really learn to drive a car if you drive it yourself and no-one could drive my wheelchair with me. It was all I, me and myself.
I decided I wanted a Macbook as well as the normal windows computer so I bought one and did it all on my own. There is no-one at home that can work on a Mac. Cooking is also a self instruction. You might have a cookery book, but your own style gives it that individual touch. Learn a foreign language. The teachers point you in the right direction, but talking the language is the main advantage.
Yes, I am a self made person. Who needs theory. I invent my own theory.