I went back to school after I got a somewhat useless undergraduate degree. It was a lot easier the second time around because I was paying for it myself and had already gotten most of my partying out of the way.
I did notice the older students tended to ask more questions in class. I guess because they weren't scared to speak up, but sometimes they were stupid questions. I had one professor tell an older woman not to ask anymore questions because nobody else cared
He was right.
Good luck!