because I am convinced that the whole class will be full of fresh faced 18 - 24 year olds, as opposed to the more mature student like myself and I will stick out like a sore thumb?
I have pondered about this for quite some time and have finally decided to try to get myself an education, and hopefully a decent job at the end of it.
I am however getting very anxious about returning to a class where the majority of the students are under 25. I don't even know why this is bothering me as much as it is.
I know of no one IRL who has gone back to college/uni as a mature student.
My eldest DC went to college alongside other 18 - 20 yr olds, and said there was only 1 student who was over the age of 40. 
I do suffer from anxiety problems anyway, and as a result have practically become a hermit over the years. Only lately, I have begun to regret doing nothing, and I am becoming more and more aware that this is the only life I have got, and I want to do something productive with it, apart from have DC.
Has anyone got any experience of returning to education after 35?
Does it depend on which course I take as to whether the majority of students are 18 - 25?
Do I just need bags of confidence?
Has anyone felt anxious at the thought, like me, then found it was actually ok?