No worries. I use “actresses” all the time, and “stewardess”, too, although I think nowadays you’re supposed to say “flight attendants”. The hard part is that some women actors want to be called “actors”, and some “actresses.” You never know.

In my story, it was “actor” because that’s what my wife wanted to use. It’s not a hard rule - it’s a difficult one, but not set in stone. It depends on the individual’s preference.