In my case 8000 steps (around 5.5 km) is something I am able to pull every day. Having a dog makes it more fun.

I've tried also 10000 steps for a while but it was non-practical, just couldn't fit that extra mile.

During the 6-week streak of 8000+ step days, it felt as if a switch 'flipped' and I went from a plateau of 90kg to 85kg (what I saw as a target) and surprisingly am able to maintain it at that level for a few years now, without almost any changes in dietary or activity habits, even throughout the 2020 lockdown.

I'm a typical developer/couch potato, I do not avoid occasional junk food, beer, extra slice of cake etc. I try not to eat late, except for nuts and seeds. I wholeheartedly recommend Turkish? (white, large sort) unsalted sunflower seeds, which have nutritious benefits according to Dr.Google, plus it definitely helps the next morning.