It's OK, PackNThick. This culture's biased toward early male knowledge of (and experience with) sex.
Wait until it's the right time with the right person. That may take some time to figure out.
Me, I had lots of oral sex and handjob play from the age of 10 on (long story). But I lost my anal virginity at the age of 35 to a wonderful, sensitive, considerate topman who soothed my fears and made me enjoy bottoming (no small feat, considering all of my issues with pain, masculinity, self-image, etc.).
My point is that there are others out there who, if not in love with you, will at least treat you kindly and sensitively and who will help make your first time a truly memorable experience for you.
My best to you,
NCbear (whose first time at 35 years old was stunning in its warmth and passion)