Alone or not?

I am 18 and have never been sked out on a date or kissed (you get the picture. It is not bc i cant talkto guys bc i find them easy to tak too, but most guys are afraidf of my height. My prom is slowly coming and on of my college friends said that he would set me up with a tall 21 year old guy who was good looking and friendsly. I am sort of nervous about the whole thing and am not sure if i should be gong out with a guy 4 years older the first time around. What do you guys think?