In general, universities are probably the friendliest places to transition; I am currently studying and will make sure to do so until I am "done" (whatever that is) with transition. People have been extraordinarily friendly and accommodating, with only a few episodes like being misgendered by the otherwise nice woman who registered my legal name change (I mean, what the... I think someone should get sensitivity training). But in general, it has been a great place to transition, perhaps especially because people don't really even raise an eyelid if I'm trying out new things; there is no dress code other than "wear clothes".
Obviously some universities may be different, some may use uniforms, others may be hostile due to religious affiliation or simply because they're in a conservative area, but I daresay that almost anywhere, universities are more accepting places than the surrounding areas. Even here, in famously tolerant Oslo. I have received ugly stares in town, but never on campus.
There are probably a thousand ways to come out or start transition, but for what it's worth, my advice is to make sure to do so while you're studying, regardless of which other choices you make. It will be so much easier than transitioning in a workplace.
Good luck!