psych honours help!

hi! im doing my third year bachelors in science, majoring in psych right now and want to do honours next year but i have no clue where to even begin. do i just apply using the handbook? also should i apply at other unis too in case i dont get accepted at uwa? when should i start the application process? sorry for the overload of questions, i'm just super confused and would love it if anyone could give me tips or tell me a rough idea of how it all works. thanks!