Reduce consumption of alcohol, refined carbs, sugar, UPF. You'll have infinitely more energy and everything else will be so much easier.
Eat healthy: lots of vegetables, moderate amounts of protein, some healthy fats and dairy. Experiment with cooking simple whole foods. Add things like herbs, lemon juice, garlic, ginger, chilli sauce, horseradish, mustard, hoisin sauce, fish sauce, soy sauce....... etc to add flavour.
Exercise at a set time a day, even if it's just 15-20 minutes a day. Check out Lucy Wyndham Read, Growingannanas, Heather Robertson, Caroline Girvan. Do a plank or a few stretches while Watchung TV or waiting for the kettle to boil.
Nurture things that give you joy - for instance music, art, reading, theatre, friendship groups, long walks..... whatever floats your boat, but reserve time for it and do it consistently.
Keep a diary and reflect on your life and goals every now and again - without too much navel gazing.