If you have never dated, jumping straight into poly could be difficult. I guess it doesn't have to be, but polyamory tends to accelerate relationship waves for a variety of reasons. That's not inherently bad. It COULD be useful in learning, in fact, depending on the type of person you are. I don't have enough information. But every relationship has waves of a sort, different moments where growth is possible. Those moments often require a lot of emotional skills, many of which are developed by BEING in relationships. If you are in mulitple relationships at the same time, those waves tend to affect the other people.
I'll give an example from my recent past (like a few weeks ago!). Quick background: I'm married; my wife and I are poly. We've been together 10 years (total) and open for 5. I started seeing a woman a couple of months ago, which esclated to love very quickly. She has a partner. They've only been together for 1 year but open for 9 months of that. This all matters to the example because my spouse and I have experienced most of the early relationship waves already, but they haven't.
Ok, my new partner (a woman; I am a man) definitely kept her other partner in the loop, but since she had dated a few guys before (but didn't get super serious with them), he didn't think much of it. However, when he found out that she was in love with me, he started experiencing feelings that are best described as envy rather than jealousy. However, there was a bit of insecurity there as well (a bit of "Oh no! Will he replace me??"). This is a natural feeling in the circumstances and something a lot of women hinges (a person seeing two other people who don't have a relationship to each other) deal with. It's practically cliche, and with good reason. Men are taught to be possessive, and even when we try to break that social norm, it's how we are raised. So there are adjustments most men have to make. I've already made most of those adjustments (my wife has been out with several men, even fallen in love with one; I've dealt with these feelings already). This is brand new to him (and to my new partner for that matter).
Ideally, this would be between them, and I would not be part of it. But realistically, that's not going to be the case. I'm not the direct cause (I didn't do anything, I mean), but I'm still the indirect source. If I didn't exist, no drama. This leaves my new partner with options she has to consider. Does she break up with me to re-assert her previous relationship? That's one extreme. Does she just let her partner deal with these feelings, without doing much? That's the other. The best option will likely be somewhere between those extremes; something like reassuring her partner and letting me know what (if anything) I can do to help mitigate what is happening.
In the world of poly, this kind of issue is pretty common (and relatively minor in the grand scheme). In fact, we've already dealth with it (I think! sometimes things return!). However, we are all over 30, with other relationship experiences behind us. In fact, all of us have been married before (though they are not married to each other). That gives us a lot of experience to help guide what we do.
That's a lot of info, and I didn't mean for the example to go that long, but it's a good example of the kind of thing that can happen when you try to have serious relationships with multiple people.
OTOH, if you just want to DATE multiple people at the same time (not fall in love, or at least not with the intention of falling in love with more than one of them at the same time), go for it! You are young and single and that's a great time to explore dating different types of people. It will give you a good idea of whether you do want to have a serious commitment to more than one at the same time. It will also help you build a lot of relationship tools, which are always useful!
Wow, that was a lot of words. For the short version, see Evie's post above this one
