Ugh yes so overworked these days I actually don't have any free time to myself now. With school work and doing commissions for tuition and my comic I'm having a tough time relaxing.
Most rest I get now is during sleep haha which is sparse since my classes are 7am - 7pm and in between i draw
BUT I've found some solace in binge watching cartoons. It can really take your mind of things and they're good to background noise when you're drawing too. Also eating, I try to savor my meal times when I can cause it forces me out of my work area and gives me times to breathe.
But really if you have the time then my ultimate suggestion would be to watch the dawn or sunset, nature is very therapeutic.