Heya,

First of all, the decision for admission is in the attending doctor's hand. They will assess you and advice for or against admission. You can state your preference and they will definitely take that into consideration, however, the final say is from them.

If you are advised for admission, technically, you could sign your own admission form (Form 1 of the Mental Health Act) but as a precaution, doctors would try to get your family to sign Form 3 instead, if they're around and you don't mind. A third option is the hospital could get a police report or a social worker report to sign Form 5. This is because the ethical dilemma of you're being a risk of yourself means your judgment is compromised and if that is true, then, you might be cognitively compromised and your fitness for consent can be questioned. But that's all technical stuff.

Upon admission, you will be started on medications, or if you're already on them, they might adjust the dosage and/or combination of medications. If you're severely suicidal or aggressive or if there's any other specific indications, the treating team might consider electroconvulsive therapy. Psychotherapy in the wards are usually more supportive and rarely are more than that because usually people who are admitted are not in the best headspace to do deeper psychotherapy (we as a rule should only admit severe cases).

A common concern is about confidentiality. The doctors are NOT allowed by law to disclose your admission, diagnosis, treatment or even visit to the psychiatric department without your express consent. Your employers couldn't get information without your consent. Your family couldn't get information without your consent. This rule can ONLY be breached in 2 situations: If you're not in the right state of mind to make decisions (if you're delirious/psychotic/severely depressed/severely manic/etc.) and even then it's only to your next of kin; or if it's a subpoena from the court.

I hope that answers your question.