May I suggest that you pool all of your FA questions into one post. Indeed, it will take a little work on your part, but it seems that most of your questions are of a similar vein.
To try to answer you . . . most airlines have a standard uniform, but the piece options yield many different looks.
Most airlines train for all aircraft types, and as such, you could be domestic or international, especially as a new hire. Only the more senior staff get to select their ideal month of trips, be it domestic/international, or aircraft specific.
Again, gather your thoughts . . . and post them collectively . . . it may take some effort on your part, but I think you will reap more in knowledge.
You have several years of research ahead of you . . . what is current now more than likely be different in a few years.
I hope you will find my advice constructive.