The first phase of getting back to resistance training focuses on training your body to burn fat, boost your metabolism, and build your stamina. 

Follow along with the 45-minute workout in the image below. Complete each exercise for 15 reps, resting 30 seconds between each exercise. Once you complete the list, rest two minutes, then repeat it again 2 more times. 

Try to do the workout 2-3 days per week, allowing a rest day, cardio day, or mind-body exercise day in between. 

Progress the workout by adding 2 reps to each exercise each week in April.

Feel free to modify and add variations that fit your capabilities and time allotted to workout each day.
 
Start here, then visit the Fitness Comeback YouTube channel for follow along workout videos as we start building this foundation to progress your goals.