Are you aiming at passive or active side income? I find active work on the side to be much more manageable than passive. E.g. you could start doing contract or

Are you aiming at passive or active side income? I find active work on the side to be much more manageable than passive. E.g. you could start doing contract or consulting work on the side. Keep your employer in the loop. It's important that they know about your side activities or otherwise you might get into trouble. Passive side income is much harder to do if you don't have experience with this kind of work. Especially if you have a family and cannot commit to investing a lot of time. You need to get really good at self management and make sure you don't commit months worth of your time into something that later turns out to not earn you any money. Start as small as possible. Don't make the mistake of thinking that a product consists of code only. From my experience at least two thirds of product success is outside of engineering (design, marketing, sales, finance, management). Good luck!