I am not in WA but have been through the early stages of adoption/permanent care seminars.
As adoption is a long journey in Australia, I think it is great you are heading to the seminar early as sometimes that is a pre-requiste for going any further and they sometimes only run them a couple of times a year. I know quite a few people who have adopted or who are waiting for a child to be placed with them, and they all said, start the process early if you can. It is good to know what the options are and the seminars are the best way IME to find out what you have to do and the realities of adoption. Too often people just offhandedly say, why don't you adopt. At least by going through this you can answer them with the facts as it isn't easy and isn't always an option available (at least it isn't for DH and I in the ACT as we are considered too old for local adoption).

Be prepared for a fairly full on session, but it is manageable and it will probably be the same as in the ACT where you don't have to give them any details of your situation. It isn't until you formally apply when your life becomes an open book and the rules about not being able to apply while undergoing AC kick in.

I would be interested in hearing what the situation and process is like in WA once you have done the seminar.
xx