What would mean this needs more than a course

Put here deliberately. If one of these is you, do not read four more lessons first.

Low mood for most of the day, most days, for two weeks or more, with the things you used to enjoy no longer landing. Any thought of harming yourself. Food being restricted, or brought back up, or exercise that has stopped being optional, or weighing yourself more than once a day. Mirrors or photographs eating hours, whether you are checking them or avoiding them, or not leaving the house because of how you look. Cosmetic procedures sought again and again with no satisfaction after any of them.

And one more, which has a cause worth checking rather than a habit worth studying. Self worth that has fallen away since a new medication started, since a birth, or since somebody died.

If one of those is yours, lesson six is where the routes are, and there is no reason to read the four lessons in between first.