Yes manual is safer and a means to get to know each other.This is safer before doing intercourse.Suggestion of yardbull is good and practical.
https://www.google.co.in/?gws_rd=ssl#q=what+virgin+should+do+in+initiating+sex
Visit the above link and read few websites. This will give you confidence. Generally you have to cooperate whatever he is doing. Few things you may remember. If the boy is overexcited, he is likely to ejaculate earlier. If this happens, do not show your annoyance. Keep him in proper mood. Attempt another sex act after half an hour as it takes minimum half an hour to recover the sexual urge.You are likely to get some pain or slight bleeding. your vagina and his penis should be wet before penitration. If they are not naturally wet you may use lubrication. Try to pinpoint our your erotic zone..
Neck,breast, inner part thighs, back etc are erotic zone. you may indirectly hint towards your sensitive zone. You should remain relaxed most of the time. Attitude of love and affection helps to enjoy sex act.
Read few websites to get confidence.
Be sure to use at least one form of birth control if by "sex" you mean intercourse. However, from the way you asked your question, there are other ways of "having sex" which would be safer, such as manual or oral.