You said you want to do research, so I'm hoping to help you focus those efforts a little. I guess the question is, what are you looking for, specifically?
1. More information about "am I or am I not?"
2. Information about therapy in your area, support groups, etc.?
3. Help with some kind of limited transition (insofar as you do not want to come fully out at work) i.e., help with going on hormones/hiding the effects of hormones at work, dressing at home, safe places to be out as yourself, etc.?
4. Obviously surgery of any kind is off the table if you never plan to be fully out at work, so I won't bother discussing those kind of resources.
There are no rules about transitioning. You can do as much or as little as you want, or nothing at all. The time table is yours to control.
Information about all of the above and far, far more is available right here in Susans, particularly in the Wiki section, which can be found here:
https://www.susans.org/wiki/Main_Page