Hey, I feel your struggle! Trust me I do. Before I entered the psychology field do you know where I was? In the technology field (computers etc)! I knew that field did not even closely reflect who I was, and, thank God, a friend of mine gave me a very much needed kick in the butt. She said "I don't know what a person like you is doing with computers. You should be working with people". She suggested either psychology or social work. She herself got her masters in psychology at that time but ended up doing social work. I was 34 when I started my masters program, at 36 I graduated, then 6 years of internship, licensing examinations, and now I am in my 4th year post-licensure.

Unfortunately, I don't know how the system works in Spain where you live to give you some practical advice on how to enter the psychology field. I was in Spain once ( I loved it by the way) but as a tourist of course. What I do know though is that there is always a way for doing what you want to do. May be there are some general psych classes at a lower-level colleges that are free or low-cost that you can take just for the purpose of self-education, not necessarily to change careers. At the beginning you don't need to get into the profession immediately before you didn't get a flavor of the field in general. Take a couple of general psych classes at first and later it'd be clearer to you what next step to take. We can only take one step at a time, and we can't see the whole way toward our goals from where we currently are. You will discover more as you go.

Feel free to ask me any questions either here or privately. I know what it's like to be at life's crossroads and I am always glad to help with information and by sharing my experience.