The key is to do the activity daily, for 40 minutes. After that, you get 25-30 minutes, you're burning fat cells. So anything you're doing, make sure you're doing about 40 minutes of it. And if you're doing that every day for 40 minutes, you will see a change. You can walk anywhere.
Every building has steps.
Most people are so ready to get going they don't want to warm up. So proper warm, definitely important. And you don't want to over stretch because you can pull a muscle trying to stretch it. The final outcome is up to you. Decide that you will pursue excellence where your health is concerned, and expect that you will realize your goal.