Don't be! the whole point of this was to build something for myself, and use the process to reflect. There's no reason why trying something similar shouldn't work for you, I certainly wasn't the first to implement a personal reader.
Fun fact: I just skimmed through one of the indie web posts I linked (which I had read months ago) and it struck me how much of their ideas I just replicated almost verbatim in my post:
> Firstly, don't try and make your software work for everyone, or just for a specific set of people you think may be interested. Make it for you.
> By making it generic and possible for others to work with it, you'll make tradeoffs that may make things worse for your own usage, or may even design for an imaginary user that may not even exist, or build a system that with 17 different configuration items you could have a completely different system. Be selfish and make it more useful for yourself.