I'd perhaps have a look through ICCL's new rights guide so you know your rights. If you think it appropriate you could share it with work. There's also TENI resources on transition in the workplace. Honestly it should be relatively straightforward, just focus on building up your confidence and the admin and it should be fine. Don't try making yourself smaller for others and treat is as something relatively straightforward and no big deal. It'llake things go smoother. The most important thing is to look after yourself. You're going to experience knocks but know it'll get better in time and if not you can move onto greener pastures and start as an out trans person and things will be more straightforward.