> The obvious course of action when you are unsure about something is experimentation. However, a relationship isn’t an activity (like a job, hobby, or sport) to try and quit when you don’t like it. It requires two people, and you must find a second person willing to try. Finding someone is hard, though. This brings me back to what I said a few paragraphs ago; I don’t see myself ready to invest much in something I’m…
Assuming you don't break someone's heart by betraying them or some other awful action, taking responsibility for a broken heart is putting way too much responsibility on yourself, and not respecting other people's agency.
It's also going to probably sabotage your attempts to learn-by-experimentation in relationships. Most likely the person on the other side of the relationship isn't going to know where it's going from day 1, it could be love, it could be something less but still fun, it could just be one or two dates. None of those are necessarily bad outcomes, but if you're weighing yourself down with all that pressure, you're going to make it harder for yourself to be open and honest and have fun.
You have some catching up to do - others may have learned some basic relationship skills in school, say, where the stakes were obviously lower and few people were getting married or anything anyway - but IME step one on getting that practice in is to take away that pressure and take it easy. One good thing to help with that, I think, is not to be too picky - if you haven't dated much, you probably don't know what your "perfect match" is like, so go out there and find out, versus waiting for one person who you build up so much in your mind you sabotage yourself with the anxiety of screwing it up.