Hi,
There's lots on here about reducing weight, without at the same time going too hungry. I found that cutting out all sugar, where I could, together with rice, pasta, white bread, cakes and mashed potato - and all the processed foods you referred to in your OP - meant I started to lose weight. OTOH, I kept eating some others, like porridge and wholemeal bread, but in strict moderation
I also found I could substitute reasonably bulky foods - like mashed celeriac, cauliflower, swede and lots of green vegetables (mashed sprouts with flaked almonds and cream is now a favourite, lol!) - in order not to go too hungry. I drank quite a bit more water during the day (zero calories, fills you up and has other health benefits too).
The effect of that, and some reductions in drinking beer

meant the weight started to go and I was sometimes losing as much as 4lb/week. I'm afraid I did precious little exercise, partly because I tell myself I haven't got time, but mainly because I find it boring, so I can honestly say my weight loss has been down to diet.
The one thing that really surprised me though is that, as the weight came off, my appetite fell. If you look at other posts, that isn't unusual, and it sure helps when you're struggling with it all.
Good luck, and let us all know how you get on.