@rEn Welcome to the Forum!
you only need to request a Beta slot for iOS via PM.
This is because due to apple's policy an open beta is not possible.
To block malicious bots and accounts being created to PM spam everyone a small action of almost no effort is required.
There are multiple ways to get the rights to PM but the easiest one is the following:
Browsing the forum for a few minutes and getting to know the community will make you earn the 'basic' badge with which you acquire the PM functionality.
There are multiple people without a Beta slot participating actively on the community and are enjoying themselves.
Edit: some funny things you can do for example are introducing yourself, checking out if there are other people from your region, take a look at the artwork section or even play the two word story game. (the last one actually is funny)