>>76419816 (OP)It's not about how much you walk, it's more about consistency.
10k daily steps is a common goal because it's easily attainable for most people. You can use it as a base-line for your physical activity. But you have to be consistent. Get a step tracker and try to hit that goal every day. What this does is set you up to consistently burn the same amount of calories every day.
The next thing is to count every single calorie you put in your mouth every day. This allows you to consistently eat the SAME amount of calories every day.
Do this and weigh yourself for a couple weeks. If you're not gaining or losing, then the caloric amount you're eating every day is your maintenance. If you're gaining, then you're eating more than your maintenance and you can lower your daily calories by a couple hundred calories until you hit your maintenance.
Once you've identified your maintenance, you lower your calories below that and you'll lose fat. How much less you eat is up to you. I can tell you that 1,000 calories below maintenance is healthy, but you may not have the stamina to put up with it.
The important thing is that you're CONSISTENTLY active every day and CONSISTENTLY eating the same amount of calories every day so you have control over the numbers.