I am probably just going end up repeating most of what was already said here but you should be fine. There is an older lady at my school (50's) and she seems to be doing fine. She seems nice too but she makes a few mistakes. Too often she either interjects her own life stories or asks too many needless questions that would never in a million years be on an exam. I know it is important to learn but I don't think the second week of contracts is the time to be asking for indepth information about suretyships because the text made some random reference to it. If you are really interested, look it up in your own time instead of asking the professor to get away from the subject matter, or just wait til it is covered because it is likely to be covered at some point in your law school career. I know that she asks such questions all the time bugs a bunch of students.
Honestly, for you, I wouldn't worry too much. Most of my class is in their 30's, and even more of the night section is. I know if you are day or night session but you are hardly going to be alone in your age group. Heck, there is a 60 something guy who is older than some of the professors who is going to the night classes just so he can learn it. Doubt he will have a lot of time to practice but hey, whatever works for him.
Again, just don't interject your life stories too much, don't ask needless questions that will bog down the professor's time, don't look down on the other students (and believe me that is harder than you think given how some (and yes I will even admit this even though I am one of the younger people in my school age wise) of the students are very immature), and a general word of advice for all incoming 1Ls, don't buy into the stupid drama that some of the insecure students create for everyone else. Case in point, I used to study with a girl who was just a friend and neither of us had any interest in each other. She began sending me weird messages on facebook and stuff though that I took as just being friendly but my gf took as her flirting. I told her that I didn't feel comfortable with her sending me those messages and she said she would stop but then she started back up again. Ultimately I had to not study with the girl anymore because I just couldn't take her acting this way. Lost my study group this way and she is outgoing and friends with half the students at the school including 2L/3L/4Ls whereas I am more quiet and reserved. She turned a bunch of her "friends" against me and they now snicker and make comments when I walk by. In the end, I did the right thing by telling her to get lost but just take this story as a word of warning to not buy into the drama of law school and not trust another student too much.