First off, I don’t think you’re a freak for reserving full sexual expression till after you are married. It wasn’t too long ago when that sort of thing was the norm. And as you say, even though nowadays most people enter marriage as established sex partners, that alone won’t insure a marriage will be a success.

So ok, if a successful marriage is not dependent on sexual experience what does it take to make a marriage work? Hell, if I knew that I’d bottle it and make myself a well deserved fortune.

For the sake of argument, let’s just say you are the marrying kind and that you simply have cold feet, like every bride and groom to be does. Let’s say that you and your fiancé have made the right choice…for you…to enter your marriage as virgins. What’s next? Possibly you need to jettison the Pollyanna notion that marriage is a breeze. Your recently married friends are having problems because there are always problems in a marriage. It’s the nature of the beast. Hopefully, the problems you guys will face won’t be insurmountable. But, sure as shootin’, problems will be your constant companions, sometimes they’ll even big problems. So count on it and prepare yourself accordingly.
If you have an unwavering commitment to one another to do whatever it takes to make your overall relationship work, you’ll probably be ok. Being sexually unfamiliar with one another may be a liability or it might be an asset. One thing is certain, if you guys start to have problems with the whole sex thing, as often happens for newlyweds, get help right away. There should be no shame or embarrassment about that. In fact, you might want to be proactive and start looking around for sexual enrichment courses or videos to help you grow together as lovers. Look to my Product Review Page for some video and toy suggestions.

Here are some generic tips. 

• Great sex is dependent on mutuality. Be sure your partner knows he or she is loved, appreciated and respected. One of you may discover that he or she has a stronger libido than the other. That’s pretty common. Deal with this immediately, like adults. Don’t wait for your relationship to go broken. Accommodations and compromise are always necessary in seeking the common good. And people come to compromise and accommodation through effective communication. If you don’t know how to do that, your relationship is doomed.
• Passion is not a dirty word, nor is creative sexual expression a sin. If you have religious scruples about enjoying your body and that of your fiancé you’re headed for trouble. Boredom in the bedroom, particularly for newlyweds is a recipe for disaster.
• Saving yourself for your wedding night does not preclude you being well versed in self-pleasuring. In fact, the more you know about your body and the mysteries of your sexual response cycle the smoother things will go for the two of you on your wedding night. Nowadays there is absolutely no need for anyone to come to their marriage bed uninformed about sex in general and his or her sexuality in particular. And come prepared; always have lots and lots of lube handy!
• Like I said, mutuality is the key. And since we all evolve sexually, both of you will need to grow right along with your partner. Make your sex play an adventure. Never hesitate to check in with one another to see how the pleasure thing is going. What worked last time is not necessarily gonna work the next time.
• Spontaneity is always a real good thing. Traditional marriage doesn’t mean you have to be stogy. Both of you need to take responsibility for seeing that your intimacy needs are being met. Sometimes that will involve fucking like bunnies, other times it will mean vegging-out in front of the boob-tube with a fist full of Häagen-Dazs.
• Openness and honesty about your most secret sexual desires and needs is essential. Can’t trust your partner with your secrets, you oughtn’t be married to him or her. Take responsibility for your own sexuality. Ask for what you want and need, but don’t neglect caring for yourself.
• Seek your partner’s pleasure before your own. This is particularly important for a man. If you become too busy to celebrate your sexuality together, you are indeed too fuckin busy. Prioritize your life with your partner at its center.
• There’s a fundamental difference between making love and fucking. Both have their place in a healthy marriage. And there ought also be room for solitary sex too. Everyone in entitled to privacy and private time, especially in a marriage.
• Have some creativity about your sexual expression. Toys, fantasies, role-playing, they’re all good. Don’t be afraid to experiment. Attend to making your sex play spaces fit the mood — romantic to down and dirty. One size does not fit all, if you catch my drift.
• If you plan to go to seed once you’re married you can be assured that the fire will go out just as soon as you do. Stay in shape, get plenty of exercise, and keep yourself attractive to your partner. Pay attention to your personal hygiene. No one wants to bump someone with a smelly body and bad breath.
• Make sure your partner is fully aroused before full-on fucking. And remember sex is way more than the old in an out. 
• Finally, have a sense of humor about the whole thing; it will help take the edge off.