There is no option there than to do some basic exercise for your body.. as you need food for your brain and body to work properly, as your physical activities are important for body and mind and heart too..
Your work from home might not be for 24 hours. You have to start with 15 minutes of physical activities.. Start with just Walking for 15 minutes after every meal.
And you will feel good and healthy
Next Steps
listen to some motivational audios. it will help you to fight for anxiety.
Health Tips
do some prananyam in morning