For someone that's not a web developer, I found Kanboard to be the easiest to set up, and it has all the basic features you'd expect. It's a traditional PHP app where you copy the files to your web server and set a few configuration options and you're good. If you want to use it locally, you download it, run php -S localhost:8080, and start using it.
https://kanboard.org/
Note: The project is in maintenance mode, it hasn't shut down or been abandoned.