hello!

figuring out your sexuality can definitely be confusing, and there's no pressure to figure it out right away or even stick a label on it, so don't worry too much!
That said, coming from an ace person myself, asexuality definitely is a real thing! Asexuality itself is a lack of sexual attraction, though people who are asexual (often shortened to ace) can and sometimes do have sex, or they might be completely against it. For instance, I'm what is generally described as a sex-repulsed asexual person, which means even the concept of sex and things like seeing it on TV rather grosses me out and I don't really understand it. Personally, I've never had sexual attraction to anyone, I've never masturbated or had any of the associated physical sensations that I'm told happen, and I don't really have interest in changing the fact I've never had sex. Though, in my case, I think my asexuality is also linked to my gender dysphoria, though they definitely exist separate to one another.
Asexuality also exists on a spectrum, as it's a very nuanced thing that's often unique to the individual. I'm not super familiar with the full spectrum, but for instance some people are demisexual, which generally means they only feel sexual attraction to someone who they've formed an emotional bond with. I'd definitely recommend looking further into it.
To my (albeit limited) knowledge, having orgasms doesn't mean you're not asexual, as that's a physiological response that comes from the activity. Though that's definitely something I'd recommend looking into, both in terms of thinking about how you felt during it and seeing the experiences of other people, as I'm not sure on the exact interplay there.
I know you didn't mention it and I don't want to presume, but if you're thinking that you might be asexual then you might also want to think about your romantic orientation as well, since they're very different! Personally, I'm gay and asexual, which means I'm attracted to guys in an aesthetic/romantic sense and want to be in a romantic relationship with a guy just not a sexual relationship -- for instance, I'd want to get married and do things like cuddle and hold hands and sleep in the same bed and spend my life with someone, just without all the actual sex stuff. But a lot of people who are asexual are also aromantic, which means they don't experience romantic attraction either. -- again, it may be you already know where you fall in that alignment, which is great! But if you're unsure, it could be worth seeing if you've had 'crushes' before and how you felt around them.
I won't lie, it can be difficult figuring out whether something is aesthetic, romantic or sexual attraction. Generally I try and classify it as aesthetic attraction is I like how someone looks but wouldn't go any further than a romantic relationship with. Romantic attraction for me is sort-of a giddy feeling? I want to see that person and be around them and be physically affectionate, but then I believe sexual attraction involves arousal which I've never felt even when I've been aesthetically and romantically attracted to people before. So, it's kind of about looking back at past relationships or crushes and seeing if you can pick out what type of attraction it was. You seem to have similar experiences to me, so it's very possible that you're asexual, but at the end of the day that's only something you can figure out!

Of course, it might be that you're not asexual but you had a bad time and don't like masturbating, it's always possible! Especially if it was your first time, since I'm told that apparently often sucks for women, not sure why. But hopefully this has helped! 😊