If you meet the right criteria you can join BALPA if you are a student, CPL un-employed or employed.
I see you are from Spain. I am from the UK and fly commercial overseas on a licence issued by the UK CAA, Balpa charge me £24 for membership/year and I have access to all said information/conferences. I suggest you PAY UP like everyone else has to.
Like you say a small price to pay if it helps you become employed.