Losing weight postpartum with 2 kids in residency

I’m struggling to establish a daily routine that allows me to lose weight and tone my body. As an FM intern with two children, my time is either spent at work, relaxing, spending time with my kids, or household chores. Thankfully, I have a great support system but it’s still challenging to find at least 20 minutes to adhere to a routine. Any tips or advice?