If you're looking for a serious relationship, your level of experience in the sex department is of no consequence. It's going to be your ability to understand, anticipate, and meet the emotional needs of your partner that will make it a success or not. If that's solid, even bad sex can turn into good sex.
I learned to fake my way through socializing, dating, and even into a marriage, but that's where fooling a person stops, because you just can't fool your spouse, and now we are both struggling to understand each other. Where to learn all that relationship stuff? Beats me. That's why I'm at WP, because I don't have a clue.
My advice is figure out the deep stuff (somehow) before you even think about jumping in. There are worse things then being a lonely virgin. Trust me.
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We are not so different from potted plants in that, if given everything we need to be properly nourished, the outcome can be incredibly contrary to when we are not. A flower won't grow in flour, and neither can we.