Don't stress about it. Write (or finish re-drafting) the rest of the book. Your writing skills will have improved by the end of it, and you'll probably want to practically re-write again the opening chapter (probably the first quarter of the book, really) regardless of whether you spend 30 minutes or 3 hours on it. Just finish the book. Truly, do not write some 'catchy' opening line. Just go straight into the first chapter, no 'opening'. It'll appear much more sophisticated that way, and you won't waste time overthinking it. Catchy opening lines tend to make a work sound amateur-ish, anyway, and they're what everybody is going for; if everyone's read something similar (and most so called catchy openings do tend to be similar) they're rather useless even in the 'good hook' department, anyway. Rather, focus on making sure you include the inciting incident in the first chapter, or, if that's not possible, a mini-plot which will build up to the inciting incident. Though it's probably not a good idea to have the inciting incident in the first paragraph, if you really want the first paragraph to introduce a proper 'hook', you could use mini-plot which has an inciting incident in the first paragraph, and use this to introduce the book's main theme, or an aspect which will play a large part in the rest of the book, either plot or character-wise; eg, if the main character is manipulative and impulsive, and that will cause big problems later on in the plot, show them flirting with someone in order to steal their wallet, or something similar. That way it acts as a hook without giving anything away to the actual plot so early on without being a gimmick which will have no importance in the actual story, which catchy openings tend to do.