The real answer to your question is this: the difference is huge. In real life, the vast majority of women (I'll only speak about women because I'm heterosexual and I've never been attracted by a man) do not want sex the way you see it in porn. They want you to take your time, cuddle them, be nice, generous, thoughtful , careful, to go slowly to turn them on. They want you to play in their hair, kiss their neck, be soft. Not to go straight for the jackpot and put your hands down their pants. And when it comes time for intercourse, they also want you to be smooth, to ease into it. To look at them in the eyes and kiss them while you're doing the missionary (you on top, lying down in bed). That's how most women want their first experiences and their relationships build on. But not everyone is like that. You'll find as you grow older and have more experience, you define yourself better and know what you like, how you like it , and who can be compatible with you in your needs and envies. Sex is very different for everyone, there are so many variants of porn that it certainly cannot be used as a reference for how sex should be in your life. My sex life does resemble some porn, because I really enjoy sex so I find partners who enjoy just as much as I do or else it doesn't fit well. Sadly, you cannot completely tell how compatible you can be with someone sexually until you actually have sex with that person, and then feelings can start getting involved and complicating things, but hey, that's life. The best advice I can give you is use porn to explore and learn what you enjoy and what doesn't interest you at all to better define yourself,
ALWAYS respect your partner, surely you wouldn't want someone to force you to do something you wouldn't want, that also means taking this slow at first not to rush anyone, and communicate! It might make you shy to tell your partner how you like things done, what you would like to try, but it is definitely the best thing to do as your partner is probably just as shy to tell you what she wants or likes, until you've figured some of those likes for yourself
![wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
. If you don't communicate, and your partner doesn't either, then you'll both miss out and your relationship won't evolve and flourish as much as it could.
Sex is only as important as it is to you. Some people can't live without it (like me), and for others it has no appeal at all.
Have fun and wear condoms people! Safe sex!