How do I help myself

The most important thing to do is to not be afraid to reach out and ask for help. It's okay to not really know what you yourself should be doing, just take it day by day and take small steps. I'm not sure if you're already seeing a therapist but if not I highly recommend it although it isn't for everyone. If it isn't your thing, you can ask help from multiple people, maybe family, maybe friends, some local services that you can go to, anyone.

Hello, Miss. You did the right thing in reaching out.

Depression is such a nasty thing to contend with, I know from first-hand experience.

The thing about depression is that it breaks down our fundamental living habits and throws everything into disarray. The very first thing to go after the onset of depression is often hygiene. Therefore, when you have fallen so far that you cannot figure out how to help yourself, the key is going back to the most basic parts of living and work up from there. Measure how deep the damage is by gauging against how well you maintain yourself:

Do you clean yourself? Do you just get yourself wet without scrubbing? Do you neglect the finer points of hygiene? What about your home? Your social life? Do you go outside and interact with other people?

Once you have an idea of what all is broken, fixing it becomes much easier: start small, get yourself scrubbed clean and relaxed, then clean the bathroom after yourself. Small things.