the first place to get serious about being responsible for your own life is food. I'm continually surprised at how people have extensive survivalist fantasies and are very interested in imagining how they might set up their off the grid life, but they aren't capable of basic kitchen stuff. And I'm not talking about cooking skills specifically even, I know people who are good cooks but they can't run a kitchen, whereas there are average cooks who can turn out multiple meals per day. This requires an entire set of interlocking skills around budgeting and mealplanning and cleaning and organization that are kind of invisible if you have them but that's the place to start.
the fast food just has to go. I have zero objections to fast food as a concept, but buying fast food is giving money to your enemies. It's very difficult to detach ourselves from globalist corporate kudzu but this a branch you can chop down and never let grow again.