What happens when you get opened?
If you want to be a Subud member, your first Latihan is called an "opening". The usual process is that the applicant and the helpers stand in a circle. One of the helpers reads out the opening words, explaining what is going on, and the applicant states his wish to worship God. One of the helpers says begin, and they all start doing Latihan.
If you want to join Subud, you need to contact some Subud members near you, and arrange to go to them and talk about it. You need to go their regularly to show you are serious in your wish to be opened, with the usual time delay between your first meeting with the local group and your first Latihan or opening being 3 months.