Online course at pluralsight - what account to create?

I would like to watch through the (full) online course at Pluralsight, but looks like i need to be logged in.
There are several “kinds” of accounts, and its unclear which i supposed to be used for the suricata course.

  • Skills
  • A Cloud Guru
  • Flow

Also, they are all payed accounts (with 1 month free trial), right?
Which should i choose?