The acronym list is short of the 2 most important documents you need to see which are the SIP and the SEF, that is the School Improvement Plan, which is pretty self explanatory, and the Self Evaluation Form where the school evaluates itself. It is probably the first document Ofsted looks at when they visit.
There are lots of acroynms missing from the list that might be more relevant to the meetings you will go to as a junior school gov. Other examples taken from our meetings in the last week might be
FFT data - Fisher Family Trust (provide analysis of stats and provide targets based on the demographics of your school)
RRR school - Right Respect Responsibility school,
PPRM - pupil progress review meeting
APP - Achieving pupil progress approach.
It is worth having a quick look at what all these mean. There are others of course.
My MIL was a governor once and told me when I started as a governor not to get involved in committees for at least a year. Actually, I disagree with this. You need to get on a committee or two to really find out what is going on in the school. If there are decisions to be made they are often discussed in committee which is the interesting bit and just ratified in the FGB (Full Governing Body) meeting.
Definitely go on all the training going and volunteer for as much as you have time for to raise the profile of the governors within the school and to help out. Even the teachers can be a bit in the dark about what the governors do sometimes so if you can go into school and do a visit or help out with something then it is good PR for the governors and let the teachers know that the governors are in touch with the day to day happenings in the school.
I also agree with admission - parent governors are representitive of the parents not for the parents. It is not up to you as parent to make a good impression for the parents or to canvas opinion. Most don't know or care what the governors do. In fact, it was impressed upon us that if a parent ever approaches us as a governor we are to refer them to the HT in the first instance or the Chair of the Governors if the problem is with the head. We don't handle it ourselves.
It is all amazingly formal and quite well regulated by statute. I was surprised when I started. However, it can be fun too and it certainly worth doing. Good luck.