Good for you, going back to school
. Well, I can tell you from experience, that online classes aren't really that much different from normal classes. I took several online classes while going to college, and now I am a full-time online student. Online classes are pretty much the same as normal classes, however there are several things you must always keep in mind.
First, while you are part of a class, you are basically learning on your own. Some classes have forums that students can chat in, but not always. If you have the chance to talk to other student take advantage of it, but its not always necessary to your success in the class. Personally while I was talking classes at a local college, I barely interacted with the other student, and I found the group projects to be hard because the students had their own schedules I had to work around.
If there are any special programs you need to work with and you don't know them very well, you are either going to have to do a lot of self-research or ask alot of questions. Even when you ask questions though, sometimes the answers won't be very helpful. I once asked a question and was just referred to an insturctional video I could have found on my own. Trust me google is your friend.
Second, in online learning asking questions is alot different than asking in a normal classroom environment. I have had several teachers, some of which were very laid back, others of which were very strict. Though you are communicating through the internet, make sure to always keep it professional. Don't abbreviate, and don't use any internet lingo (such as replacing okay, with k, or using omg, lol, etc.) And make sure to ask questions as quickly as possible, sometimes it can take some time to get a response.
Third, self-discipline is VERY important. You have to make sure to keep on top of your work and balance all your classes. There have been times when I did everything i needed to for one class, but I neglected another class. Trust me when I say, your teachers notice and they will confront you about it, and that is not a good feeling.
Personally I like online classes better, since I can go at my own pace, which can sometimes be faster or slower than the teacher. As long as you are comfortable with the technology, understand what is expected of you and stay on top of it, you shouldn't have any problems.
Good luck, hope this helped