MtF stands for male-to-female, describing female trans people: assigned male at birth, they identify as female.  They are called trans girls/women, and have done some of the most important work in building up, fighting for and organizing the LGBT community!

A lot of trans girls feel dysphoria due to their hair length, not having breasts, not having a "feminine" figure or their genitals.  It can help to curb dysphoria to grow out your hair, paint your nails, wear jewelry or conventionally feminine clothes. There is also a technique called tucking that makes your genitals less noticeable. Here are some guides to tucking:

https://broadly.vice.com/en_us/article/d3ggjj/how-to-tuck   (this article contains crude language for genitals, so be warned if you're sensitive to that)

https://www.healthline.com/health/transgender/tucking

Good luck!

-The LGBT Youth Awareness Support Group