- Decide on what kind of character you want to write. The most important is that character is well rounded and fits in their role.
- decide on your character gender identity. Fortunately, we have a (Partial) list.
- decide how much your character knows about thier own gender identity. Not every transgender person knows they are transgender. Likely they going to know by story end but they might not know at story start.
- Remember the the usual rules about infodumping apply to transgender status. It doesn't need to be the first thing the reader learns about the character it should come naturally.
Things to avoid
if your character there no reason you ever need to reveal what they were assigned at birth.