We were just advised at college that it was wise to join some form of professional body - not only for the kudos, but as they were there for help, advise, etc etc. Some of us joiined ITEC (who became IGPP) and some joined another, whi I cant remember at the moment!!
I have to say it did help when looking for work that I held certificates showing not only my Diploma, but my membership and registration certificate from a professional body. It also mens of course that you can have the letters after your name, MIGPP, which nobody understands, but looks good!!! LOL!
I suppose if you are working from home, it is not so relevant. We did cover all the insurance, health and safety etc issues as mentioned by fozzyo, maybe because I did my ITEC course in London?
Definitely look into insurance for home tho, as we were told, if someone trips over a carpet in their home, it is tough luck, if they do it whilst in your home, they can sue!!
Good luck with the minefield!