Have an app idea, but not a techie

I have an idea for an app, which I would like to develop on the sides and do some beta testing and figure out if its scalable. However, I am not a tech guy and do not have idea about app development. Looking for suggestions on how to go about it. Learn app development from scratch or reach out for help? How long would it take to learn from scratch vs how much would it cost to get a beta version made?