If this is for a single project that you have in mind...better off to outsource the development or partner with a developer & focus on marketing, sales and other revenue generating
If you want to become a programmer, check out book "Learn to Program" by Chris Pine. Be warned though, its not just RoR you will need to learn but also database design, HTML, CSS, JavaScript at the very minimum before you will really be able to do anything.
I want to learn it for long-term rewards. It all sounds a little daunting though..
If you are aiming to quickly develop and bring an idea to market, I would recommend hiring or partnering with a developer with a solid background, maybe reduce the feature set you intend to develop for version 1 to the bare minimum. Try and use the best resources you can within your budget.
While non-developers do learn to code & launch applications in short periods of time, these cases tend to be the exception, I've seen people with sales & marketing backgrounds struggle for years to code products and never get them launched.
I don't want to sound negative, but taking a product through the entire lifecycle yourself, while also trying to drum up sales, with no technical background....it's going to be tough going.