going down on me?

So my boyfriend and I have been intimate for a while now, but he has never gone down on me and I've never given him a blow job. on Monday he asked if I wanted to try it. I don't know what to say to him. I've never given a blow job and never had someone go down on me, As he was my first. I want to, and he has in no way pressured me into doing it. I wanna do it but I wanna know what it feels and tastes like? what does it feel like for someone to go down on you? and what does dick taste like?