Rant + Need help/insight with my lifestyle

I'm a 30m developer, working 9-5 (usually work overtime so I get home late).. i have no social life whatsoever.. single.. I'm overweight and a smoker.. i spend my free time watching series/anime or playing video games (sometimes i do painting too).

I feel that I'm stuck and idk how to get out of this endless dark loop of eating-working-sleeping.. i need to get healthier.. i feel my body's failing me.. i have no clothes that fit me anymore.. i lowkey feel miserable.. to my family and coworkers, I'm in a very happy place and I'm strong/old enough to deal with anything by myself.. i feel that an outside opinion might help.. i can't talk with any of them about this so i wouldn't burden them all..

I find great comfort in food and i cook really tasty dishes , so that contributes a lot to why I'm overweight..

This post is open for all and any kind of jokes (bullying is okay too if it's funny) , on the condition you provide a genuine advice on how i can turn my life around to the better.

Thank you all and have a nice day.