Re: The meaning of omote and ura
You can step with either foot or knee - there are many variations. But, it helps to match movement between tachi / hanmi-handachi / suwari-waza. Try stepping with the right foot or knee for all three styles, then try the left. Some prefer one way, others the other. I like both, but certain techniques do lend themselves to certain footwork better. Do what your teacher says for now, but thinking about it is to start your own journey.