scared of sex

so i’m casually having sex with a guy after being in one relationship with my ex who took my virginity of five years. he’s my second partner and having anxiety and never being with another person, i’m petrified. i gave him shitty head once bc of my nerves and had my eyes closed the whole time. i can be a freak but how do i calm my jitters? i REALLY wanna have sex with him he’s gorgeous and mama needs new d. but i need to calm down :/ also dicks are so scary in your face