You will NOT become an engineer, programmer, or web developer, but you will be able to put a prototype of your idea together and maybe get one or two beta users for feedback... You will also be able to have an intelligent conversation with a developer. I get sad whenever I encounter a business person with no technical bullshit filter. Not because I'm judging them, but because if I can bullshit them, any other develop…
But I think you have a good benchmark there: Do I know it well enough yet to have a good idea of when I'm being bullshitted?