no unless having fun is a disease. how old are you? im 13 and ive done it. if u know what a clitoris then definitely give it attention. start by kissing down her stomach to increase her anticipation. then when u get close kiss the inner part of her thigh close to the vag. then start licking the clitoris. its a little bean type thing in the upper part. when she really gets into it then stick ur finger, or 2, in there but still give the clit attention with the finger but dont be too rough with it and hurt her lol

uhm depends how old are you? i really dont think its a big deal unless you dont want to. and you cant get sick unless she has a desease down there. has she had sex or been eaten out before?

The act itself won't cause any kind of sickness. You may not be keen on the taste at first but you're not going to vomit by any stretch of the imagination. There is a disease risk for any kind of sexual contact with a lover. This could be a good time to go get an STD screening togather.