You don't have to do everything by the time you're 30. Or 40. All you need is a work ethic. It's what allows you to push through moments of disappointment and self-doubt and fear.
Sex is... perfectly natural. It's something that's pleasurable. It's enjoyable and it enhances a relationship. So why don't we learn as much as we can about it and become comfortable with ourselves as sexual human beings because we are all sexual?