First Shemale Experience

I'm going to have my first sexual encounter with a Shemale either tonight or tomorrow & I'm really nervous & excited at the same time lol.. For as long as I remember I've always wanted to fuck a shemale.. But I never had the courage to act on it until recently.. Hopefully it goes well.. She has really big boobs (think Allanah Starr). For those that have already done it, how was your first experience?