Does anyone have any advice for a newcomer?
First, do your homework! Research the school that you have joined, and find out all you can about your instructor, and your instructor's sensei. There are quite a number of schools out there that have cashed in on the "Last Samurai" craze and started their own "kenjutsu" schools. I know of a couple that have absolutely horrible form and are quite unsafe! Make sure you are learning the real deal
before sinking a lot of time, effort, and money into it. Any legitimate instructor will not only answer your questions about their training, but will welcome the curiosity on your part. Most (but not all) "instructors" teaching their own made-up versions will discourage questions and hide their background.
Second, assuming that you are attending a legitimate school, do
exactly what you're told. Class is not about "winning" or "losing", it is about training. The way the Japanese sword arts work is that you repeat various exercises and kata
alot. These are designed to ingrain particular movements and methodology into your musculature so that your body will react in a particular manner without you having to think about it. This means that you have to strive to do just what your sensei tells you
exactly how he tells you to do it. This is the problem with most made-up schools in that the "instructor" hasn't had enough training to recognize, or create, the underlying methodology for his art.
Third, show up! Getting to class regularly and making it a normal part of your life is the thing that defeats the largest number of students. It is very easy to have things come up and cause you to miss a class, but you should try your best to never let it happen. The more it happens, the easier missing class becomes until one day you realize that you haven't gone in quite a while and then it's very difficult to make room for it again.
Good luck, and let us know how your research into your new school goes!