Might be a dumb question but... can you define "party"?
I have very little experience but I guess I could offer my opinion, if nothing else.
I suppose one option would be to host one yourself, but depending on your location, social circle, and circumstances (such as exams if you're in college) you might not find enough interested people. And on top of that, depending on the whole pandemic situation where you are, party life may have to be greatly reduced for a while. That applies for basically any party-seeking, not just self-hosted.
If nightclubs are open, you could just try to socialize with the other people and either tag along if you click with them, or make invites yourself.
I don't know what your social skills are like, but if I tried to use the stuff above (though I can't because exams are in full progress and clubs are still closed) I wouldn't expect to end up on a party every night I go out. I guess it would be quite a numbers game. Though that's the purpose of practice, I suppose.
I don't know. What's your goal with attending a party, anyway? Party just for party's sake? Because if you want to get laid or socialize I'm sure you could find other ways to get there without necessarily having to attend a party.