There is nothing difficult in building and releasing a product. But if you don't have any paying clients when you do, you will have spent your time very unwise

There is nothing difficult in building and releasing a product. But if you don't have any paying clients when you do, you will have spent your time very unwise. From there on you can either expect to close shop or get very very lucky. If you get very very lucky you will most likely need to redo most of what you already did. Building a product is not a marathon. It must be surgical precision work which in most cases will only cater to few, unless you made exactly what the lot wants. Build slow and sell before you build. By far the most software is either useless or too bloated for its price tag. But that's not really what you asked for. Dont build for scale. Make one human pay for what you have. That's your first assignment. From there try again.