This may seem a bit of a silly comment, but I think a very true one.
Don't worry about waiting until you are 'fully' passing or fully whatever before going full time - it won't happen.
You are setting your self up for failure.
Why won't it happen?
Because you keep bringing up the same doubt that stops it from happening: you don't accept yourself as being female and that means others will not.
I don't mean that rudely but it is the truth.
You will also face and suffer the problems of being misgendered. It happens. So what. If it worries you, it sets you back, if it doesn't it, doesn't matter.
You will also suffer the 'delusion' of being misgendered. That is, a casual comment will be interpreted by your worried psyche as being something it isn't.
I had one tonight, I could of sworn that the shop assistant said to me 'are all these yours sir?' as she served me. I didn't blink she didn't blink, the woman next to her didn't blink and I realised that I has heard something that wasn't said. There was no way anyone would call me sir in such a shop in Australia, and there are also bugger all Australian's who call anyone sir, and they aren't shop assistants.
I think that is what triggered this post; IMO your fears are stopping you and your fears are irrational, although seem real at this time.
Oh BTW why do I think I wasn't misgendered? Well one I don't care. But secondly I had gone to the shop straight from a gym session, I was wearing a sport bra top, skin tight leggings (any inappropriate bulges would be very obvious). So anyone gendering me as male would be trying really hard to be stupid and if they are that stupid they are of no concern anyway.
So take heart. Go for it when you wish and don't put obstacles in front of you.
There are enough challenges without creating more!
Hugs Sisters
Cindy