It’s (offtopic ish and highly subjective) pointed at f360 being a labyrinth that my brain doesn’t like to navigate… f360 has a very steep initial learning curve, and if you don’t like to learn by video (which I don’t) you’re in some trouble. F360 documentation is very committed to video formats for whatever reason. It’s not as simple as “make a sketch”, the workflow is far more complicated than that, even just exporting svgs is non trivial.
So, the F360 route is definitely not the advice I’d give to someone just getting started, especially for a simple creation of finger joints. It’s like recommending Carl Sagan’s apple pie recipe… you don’t need to create the universe here, finger joints are easy with generators and 2d programs.