One way to get to this is obviously increasing activity. So going from 7 minutes to 30 minutes may well help. The kind of activity of course matters as well.
Another way is to decrease the intake. It's important to know that this doesn't mean being hungry. More than eating less, it's about eating smart. Do a little research but basically you need to eat stuff that make you feel full faster for longer. Also you need to treat junk food like a bad habit and specially stop having sodas and sugary fizzly drink like that. They not only make you fat but also make you eat more. Beer, alcoholic or not, also makes you have a big belly.
At the end of the day the most important thing is, don't give up! You'll get there, sooner or later!
calories burned must be higher than calories intakes
healthier diet will help you have lower calories intake while having all the nutrients needed
exercises will help you burn more calories
healthy diet and exercises are two faces of the same coin
good luck 👍