How can I get admitted into a psych ward?

Be suicidal. This answer may seem facetious but it's not. Psych. Hospitals will usually only admit you if you're a danger to yourself or others or if you're psychotic (hallucinating or delusional). Why do you want to go? Take yourself to the nearest medical center emergency department and ask to see the psychiatrist on duty. The doc will help figure out what would help.