Running and exercising are not efficient ways to lose weight despite what the fitness and wellness industries would have you believe. And ironically the more overweight you are the less efficient it is. Great way to fuck up your joints or waste countless hours sifting through bro science and researching equipment you don't need.
It is great for keeping the weight off and enjoying life once you hit a certain point but should not be a chore as will power is finite and precious and at first you're spending it all on eating clean and walking and that is guaranteed to be enough over a long enough period.
Push too hard and you'll stall. just be patient and extremely consistent instead.
https://en.wikipedia.org/wiki/The_Hacker's_Diet
If you can go for a walk for 1-2 hours a day, just simply walk your way out of the problem. And if you "can't afford" to walk for 1 hour every day your life is already in shambles and you're not in a position to make other changes before you sort this out.
Eat clean. Walk. Be consistent. Be patient as it will take more than a year, the time delayed reward is the very crux of the matter. And don't stress, laugh more!
Laughter is the best medicine buddy.
https://www.youtube.com/watch?v=g5AixBKy7b4
Highly recommend watching Its Always Sunny in Philadelphia for Macs trajectory. The actor went from skinny to obese and back for a joke.
Very best of luck.