If your goal is to make money, don't allow yourself to write a single line of code until you have talked to people not related to you (and not close friends with you), heard at least two of them independently describe facing the same business problem, and heard both of them say "yes, that would help!" (or better "yes, I would buy that!") in response to your proposed solution. Finding a real business problem and a rea…
On the other hand, I've had a lot of success showing people proofs of concept as a way to get the conversation going about various ideas I have. Sometimes people don't know what they want/need until they actually see a pre-alpha version in action.
The answer to everything in my previous workplace was "another excel sheet" when we had a proper Django application with relational integrity and data validation. Showing them that a few clicks on a web form was easier than what they were used to - copy pasting data from one web page, pasting it back into an excel, reformatting it and uploading it, followed by a ton of data validation errors.