how to give head?

well, i’ve got a boyfriend since 05/05/18 and we have sex reguraly, but since a couple of weeks he starts to ask if i want to give him head...... but i’m 1. scared or something and 2. i’ve never done that before so i don’t know how to do that shit😳😬

can somebody give me tips or something? hahhahahaha🤷🏼‍♀️