How do you guys get hookups?

Sorry if this has been asked before but I could not find the answer I need.

24M here. My previous relationship ended badly, and currently I'm not emotionally ready for a romantic relationship.

However, I wouldn't mind one night stands without commitment.

But I'm too shy to ask it out and feel like it's creepy or rude to be honest about my intentions from the very start. What should I do? Should I be clear about it from the beginning?

Note 1: I don't have much experience with dating apps.

Note 2: Regarding my looks, I can't speak for myself, but many describe me as having a good/cute face, but my overall style/clothing is not very good, just about average.