A Commissioner For Oaths is not required for a will.

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You must sign your Will in the presence of at least two witnesses, and the two witnesses must also sign the Will, in the presence of the "testator" (yourself) and in the presence of each other. You and the witnesses should also initial each page, so that it is not possible to alter any pages after the Will has been signed. A witness cannot be a  minor, and, like the "testator" (you), they must be of sound mind.

For the signing procedure, gather the witnesses together in a room. You should make a formal statement that you have gathered them to witness the signing of your Will. They do not have to read the Will or know its contents. They are only required to witness your signature.

You should initial each page in turn, in the designated bottom corner of each page, and then sign your name in full on the last page, in full view of the witnesses. Each witness then in turn initials each page, in the designated bottom corner of each page, and signs the last page. Everybody must stay present until all of the signing is complete.