I would try not to do so much at once! It can easily become overwhelming if you try and do everything perfectly all at once. Take the pressure off yourself, rather than trying to do it ALL, eat well, work out, do chores - take it easy. If you get up and get dressed for the day then that's a win. Heck even if you eat 10 biscuits instead of 11 like the previous day take it as a win, and gradually try and get into it as a habit.
Boredom is definitely a big thing for me too. You know what i've found has helped me - a jigsaw. Hear me out...keeps your hands busy, weirdly quite therapeutic, can pass time without the mindless munching that usually comes with TV etc.
I second this, don't try to do too much at once. Try having no zero days, every day you do something, even just one small thing to better yourself and even if it's something miniscule, it's still better than nothing.
Try not to have all or nothing mindset, eg. I messed up today and didn't get up early so might as well give up for the rest of the day kind of thing.
With working out, don't force yourself to do workouts you don't enjoy. Walking is already a great exercise, 30-60 minute walk a day is a good start, and you can build up from there rather than try to force yourself to do harder workouts, get bored or discourages and give up.
With takeaways and snacking, don't need to stop completely either but maybe instead of takeaway, try making something nice at home-always ends up less calories and healthier than takeaway but still nice. Get some healthier snacks, I find popcorn to be great if you like it as you can eat quite a lot of it and it's not that many calories so you can still lose weight. Or there are different low kcal ice creams now, fruit is always a good option, fibre One bars, Yoghurts etc.
AAnd finally, you said you always feel better when you do all those things like going for a walk- think more about how much better you will feel if you do. Sometimes I really can't be bothered exercising but even if I do half of my standard workout I'll feel way better than doing nothing and I now conditioned myself to know that. Similarly I now rather chose healthy food as it does make me feel much better.