[sonnyg]

Any advice you get here will at most be useful for those people who are occasionally suffering from low energy during the normal course of life.

You, as you yourself stated, are having a total burnout. You need professional help. Try looking for different kinds of help if the waiting list is too long for what you need the most. Some kind of group therapy perhaps, somebody who is helping people build up strength after Long Covid perhaps. Consider moving back to be with your family or another group of people who will be supportive.

If doing a masters and having a 30 hours job at the same time has brought you to a burnout (triggered perhaps by some other events in your life). Then you can't recover while you keep on doing those two. Something will have to go (the job, or the study) while you recover. That is a very difficult thing to face and accept, but once the body and the mind has a breakdown after prolonged stress, there is no other way to recover. Any advice you get to get you back on your feet in two weeks is for the normal "pushed yourself a bit too much for a few months or a year" cases.