Since I live in Texas and you are in Argentina it is not easy for me to determine the culture in specific places down there and their acceptance of being trans. But what I have learned is that the fear that we experience is normal. Most of the fear is not warranted but is self created because of the unknown factors in regards to transitioning.
I am a 64 year old trans female. I used to be very nervous going out into town dressed as a female; sneak into the car when no neighbors are watching, etc. Now I could care less what my neighbors or anyone else think and just go. I am out in town almost every day and you just have to act like every other woman.
If you have not yet involvement in a local trans group is very important. You will need local friends that you can learn and receive support from.