It's not going to be a big of a deal as you're thinking it'll be.
Teachers (well, all the ones over here) have had "sensitivity training". They're taught how to deal with minority students in a respectful manner. All you've gotta do is go up to 'em and say "Oh hey, I'd like to be known by <male name> and I'm using male pronouns now" and they'll comply (or risk being fired).
Political Correctness - mostly run amok, sometimes works for you!
Also - those teachers have hundreds of students per year... there's a good chance you're NOT the first trans student they've had. While it may feel a special "new" path for you (as it does for me too), fact is we're doing something that many have done before us.
When the teachers refer to you in one way, all those new students will follow. You say you pass most of the time? Then no worries. The other students will read you as male from day 1. Students aren't the sharpest tools in the shed... they're also too self absorbed (as we all are) to look at you close enough and wonder about your age.
So yeah - the only people that could out you are the teachers, and they're paid not to
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Where am talking out of in this post? Experiance!
I'm doing a 6 month course, using it as RLT before T. I was FT before I started going there though, so no prior history.
Socially, the first few days you'll worry about being clocked. Someone will drop a "he" and you'll feel better.
Then, by the end of the week, it'll all become routine. You'll forget to worry. You'll stop watching your every move and go back to being yourself, only - you won't notice. Nor will anyone else.... you'll just end up another one of the guys just doing your thing.
Well, that's how it worked for me
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There's no way I could ever go back (I knew that before I started though). I also want T NOW NOW NOW instead of at the start of next year as planned (that MAY happen... be warned!).
I think this short course is a great idea to feel things out. It's only 18 weeks, which in the grand scheme of things is a very short amount of time if you decide it's not for you (worst case, you'd have to put up with male name and pronouns for the remainder of the course... no biggie).
