If you like walking you can call a friend and do hiking in sunny days.
You can start going out by bike or walking, avoid to use car o public transportation unless you need it. You can do 15 km by bike to go to work in one hour or less. In my city rains a lot and I use a poncho to cover me. My friends do also a 7 Minute Workout, I don't know if it works but they are very happy to do it and they are using an app where they challenge together. The most important part is eat well. Avoid restaurants and try to do your own food, and try to eat simple.
My diet is the following, is based on quality of food, not on quantity:
- I eat meat only once a week. The meat must be white (Chicken, Turkey). - I eat only pasta, bread and similar foods only with whole wheat - I don't like fish but I should eat oily fish - I eat a lot of vegetables, seeds and dried fruit - I eat light in the evening (mainly salads until I am full) - I don't eat anything that is fried, sweets, drink alcohol, cheese.