I'm scared of giving head

My boyfriend of 1 year and I are getting a little more touchy these few weeks but I'm not ready for sex yet.
I feel bad and I'm scared so he said lets take it slow, I thought about giving head.
I know its a stupid question but I'm a virgin and 18 and wanna know if 'it' tastes like anything.
If it does what does it taste like? And does it smell? I just hope I wont do anything wrong.