iPhone stuck on "preparing update"

Hey thank you so much for your reply! I restarted my phone and waited for a bit and it did update finally! I just wanted to ask for clarification on what you said though. "There is no need to worry about the website pop up as nothing can be downloaded onto your phone from a website." I know you can download things on websites as I have in the past on my iPhone but did you by chance mean that since I didn't purposely click on anything that said download that I'm fine? As I said earlier, I immediately exited out of the website before I could even see what it looked like so I didn't purposely download anything nor did I purposely type out any personal information, but I am still a little concerned that it may have downloaded something or I got malware or something of the sorts by simply redirecting me to the site. I checked my files app and saw that the most recent thing I downloaded was in fact something I had purposely downloaded so that calms my nerves slightly but if you could provide further clarification that would be wonderful.

Just a little more information to add. I'm not actually sure what I pressed was a pop up ad seeing as pop ups are blocked in settings. I'm not really tech savvy but as I mentioned I thought I clicked next chapter but there were many banner ads on the site and I may have clicked one of those but again I can't really recall as it happened so fast and I panicked. Not sure if that's useful info but I'd thought I'd share it just in case.