That's fair (and of course, as a personal project, set any goal you like! :) ) - but I wonder if that risks setting the bar too low, so that everything is 'completed'.

I think, we're in agreement : it's your project, so you get to say what 'completed' means, but my criteria is usually writing some small amount of text about it, even if that text is "this didn't work, ho-hum".