Okay OP. I get that you probably have a very rose tinted view on these things, since you met your partner so young. So here are two posts: the reality of guys out there, finding them, and other things. The second post is about your specific situation.
From what you said above (No romance!!) You are expecting to find some gorgeous hunk of man who will know exactly what he's doing, and will screw you on a bed covered in rose petals whilst telling you how beautiful you are...etc..etc...he will do things you never dreamed of...etc...etc.....
Let's be honest with you. This is never going to happen. Like, EVER.
Here is the cold harsh reality.
You will spend ages trying to find someone to sleep with that is, at least not unattractive. Or who doesn't make your skin crawl for some reason you can't put your finger on. Or maybe you will look for one night stand ads on craigslist, and quickly realise that it's full of the sort of men who like to send unsolicited pictures of their dicks, who rite lk dis cos dey r so fking cool dat speling iznt dere ting yeah, who call you a fking bitch or a whore if you don't automatically respond in kind to their explicit messages, and who are - in essence - misogynistic pricks who you shouldn't go near with a barge pole.
So maybe you will try in a bar. There - unless you are happy to shag some fucking creepy guy who starts rubbing himself on you the second you start dancing (why is there always one?) - you have to navigate the tricky and awkward conversational maze which is the game of "do they like me? I have to make it clear I like them without being creepy. Is he single? How do I tell him I want to sleep with him without him thinking I'm weird".
Normally people (men and women) try and make this conversational maze less awkward through the use of booze. Suddenly, you are less concerned about him thinking that you are insane, and are compelled to talk about your undying love for Abba, and dragging him onto the dance floor.
So let's say you do get to go home with a man. Then you have to hope he isn't the sort of man who will try and "get away" with having sex without a condom. You might have to - forcefully - insist that he use one. You might have to have brought them with you in advance.
At which point you might get into bed. Both of you quite drunk, with no idea of what the other person likes. He probably wasn't expecting guests and his flat is a mess, or there's a weird smell coming from somewhere, or his flatmate Joe-Bob is grinning at you when you arrive.
He rolls on top of you, and - since it's a one night stand - has really no need to be an unselfish lover. He does what he feels like, you will be lying there thinking "is this really it? Is this what I have been "missing"?"
And that's it.
That's glossing over the unlikely but still possible scenario where you go home with a complete stranger and they turn out to be a rapist or axe murderer.
I'm not going to say that every single one night stand is like this. I'm sure there are a minority which go well.