UC PIP NSESA and study

Hi
I have a mental health issue and I receive lower rate care, NSESA and the LCWRA element.
I am having my glued to the back of my teeth retainers removed. It has caused me no end of troubles in my mouth and I have not taken good care of my teeth because of it.
Once removed I was thinking of doing a part time course course on voice technique. I am scared this may cause a re-assessment of my benefits and I may lose it all,
I keep getting mixed answers from the benefit advisers .at the Housing association. One says to declare the other says to go and do it. For the benefit for me and others who are thinking of studying can you advise?
Also I may not be even able to cope with the study and drop out. Then it will not be worth the hassle and heartache but I want to try