I feel that way every day.
I also feel intimidated by the ferocious focus, determination, and accomplishments of the MtF ladies in this forum
I fight feelings of failure, remembering how I faked it and couldn't seem to find my place in life, how I failed at playing a woman's role.
Most women my age are still married to the same husband, have grand kids, live in the same house, work the same job or are retired, attend the same family church, have an honored place in the community and society.
I live alone, in Thailand, teaching ESL, act like some 20-something male, driving a motorbike, hiking cliffs, wading swamps, swimming waves, taking wildlife and bird photos, living a Thai lifestyle, far from my family.
Even when I think I've connected with family members or friends, I've found they expect only certain conventional behavior/talk from me. For that reason, it's often easier to skip contacts.
To understand how a transgender person feels, the other people would have to either be trans themselves or have close friends or relatives who are transgender.
Or be a Thai Buddhist.
Alternatively, one can find neutral activities and subjects with which to engage with others..mutual hobbies, sports, outdoor exercise activities, or even work, etc.
In my case, I'm safe engaging with Thai people because not only do they accept alternative genders, I'm not fluent enough in Thai to discuss gender issues with them, but am forced to stick with common topics.