Guide a rookie to start developing apps.

Hello everyone

Since I bought my first iPhone, 4 years ago I loved to develope iOS application. but the problem was: I had no understanding of any programming language. better to say that I still don't have any programming knowledge. I asked many people what programming language should I start with, some said "Objective-C" some said if u want to understand Objective-C u should first learn "C" or "C++" some said knowing java helps , and so on.

well they actually did nothing other than confusing. also there are alot of websites that say different thing about how to develp apps that confused me even more. So now I came to you to help me

Let me make my question clear 🙂 I'm a medical student who has no understanding of any programming language and I don't have time and energy to learn 4 programming languages at the same time but I'm certain to learning one programming language in order to turn my ideas into applications!

What should I do?

What should I read?

Thanks for your attentions.