I have no work motivation toward anything, do you know how to deal with depression?

Yes: I treat depression every day. It is possible, however, that you have some other condition. For example, problems with one's thyroid gland can probably mimic your symptoms. The best thing, i think, might be for you to start by having an evaluation by your local physician, or to try and make an appointment to see a board certified psychiatrist.

Yes, I do...: ...And so do many expert clinicians. It's time to get some professional help. It may take some time & some effort, but it will be worth it to care about things and to feel more fully engaged with your world. (and give yourself credit for having some motivation -- you did, after all, have the motivation to reach out with your question. It's a start!).