What's the proper etiquette for online dating when multiple people show interest in you?

Long story short I made an account on a dating site to meet people that I might not run into in my day-to-day life. First day my profile is set up I had roughly 4 or 5 girls sending me messages seeming rather interested; two of which I had messaged first.
I personally feel that kissing/making out is the sort of thing that “seals the deal” of being together/exclusive so I’ve been friendly in replying but I don’t want to be leading anyone on or potentially “cheating.”

I don’t want to just stop talking to all but one of them, but I don’t want to be a player either. I figured I’d try to get out once or twice with them before deciding if I wanted to pursue a relationship with any of them, but that puts me in the moral dilemma of “Is that cheating (in the eyes of the general people)?” Or am I already in the wrong? :(

I get the feeling I worded what I want to ask horribly, but hopefully someone can rephrase it better or gets what I mean, as always I’m happy answer questions too