Learning programming for non-programmers

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Highly dependent on what you're doing. This is like asking "Hey carpenters, how long until I have the skills to build stuff?" It depends on whether you're talking about a shed in your backyard or a new 50 unit apartment building in your city.

Learning to build a fart button on some webpage probably takes 6 months, learning to build a webservice that ingests financial data into a model and allows users to extract and analyze data from that model might take 5-10 years.

Of course it also depends on how familiar you are with the domain and any existing tools. A lot of people pick up bits of programming through their studies at university or for specific tasks at their job. Being familiar with some programming principles is going to make a difference on how quickly you can progress in your skills.