I'm going to tell you some helpful things here.
I'm sure everyone knows "san" right?
As for me my name is Sakura so people call me Sakura san.
You must never say san after your own name when you are introducing yourself.
If you say: Watashi wa Sakura san desu.
You will be thought of as an arrogant prideful person.
Or just a baka gaijin
You may call other people " ____san" but not yourself.
"san" is a word of respect,
you use it to respect the person your addressing.
To be safe, don't use any suffix after your own name.
I'm going to college to become an English teacher in Japan. I can't call myself a "sensei", however others may call me that, but I can't call myself that. At least to be technical and safe.. Thats what I heard from another English teacher in Japan.
I would say I'm a
kyoushi = school teacher