Hello & Welcome, Kimchi3!
Here's a link to PsychCentral's
Depression Guide by John M. Grohol, Psy.D. If you scroll down, you'll find a substantial "Diagnosis & Treatment" section. Resources there can lead you through potential treatment options including therapy, meds, and self-help.
People who have not themselves experienced depression frequently have trouble relating to depressives. What we experience -- and there's a range of depressive experiences -- is difficult to convey to the healthy.
May you have a supportive experience here!
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My dog

mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.