How do I show text when clicking checkbox...? and more

Hey. I'm quite illiterate when it comes to Adobe Acrobat, but now I have to create a form.

First obstacle, how can I use a checkbox (i.e. tick checkbox action) to show text? (actually both just text but also text and form). Is there a way to do this? is it dynamic enough to do this or shall I just give up. Objective is to have one form for different audiences, and some information should be visible to those who tick the checkbox, for those who don't should only see limited text and forms. Maybe there is a really good tutorial for this, or video?

I have figured out how to create forms and that was easy enough. I also found some javascripts that may work?:

var f = this.getField("chk2");
if(f.isBoxChecked(0)){
   this.getField("teamset2").display = display.visible;
   this.getField("member2").display = display.visible;
}
else {
   this.getField("teamset2").display = display.hidden;
   this.getField("member2").display = display.hidden;


}

BUT - i don't even know how to name the text. I.e. the "getField" - i guess that is only for fields, checkboxes etc. But can it be used for plain text too?

Much grateful for help. and sorry for asking probably very stupid question. But would really like to make this work.