Exercise, often, not too hard, over short time you'll get your personal level better than any coach could do. It will also prolong your life easily by 10 years and add tons of quality into it, will make you happier and more connected to your own body. All people I know also corrected their eating habits aggressively, its all connected.

If you dont have enough time get to the point when you can do HIIT safely, its literally 15-20 min max. If you have time, add long walks on rest days for example, or whatever is available to you nearby (ie swimming/surf if usable water body nearby).