I'm starting a new 5th edition D&D game with a group of friends. I've DM'ed before, but they're all new. I'd like to get started without having to buy an "expensive" ($30-$40) module before really getting a feel for how they are as players and what sort of game they expect. I also don't want to just wing it and/or homebrew adventures for much the same reason, and I feel it would do them a disservice.
I want to ask something along the lines of "Where can I find adventures for first-level characters for cheap/free?", but that sort of question generally gets closed as "shopping" around here.
How can I ask a better question while still getting what I want?