No worries!
Please do read those those first two links I posted though as they contain super important info for how to diagnose what to block or unblock, the tools I linked merely assist in white listing and other stats conveniently.
Maybe start off at say 1mill and over time slowly enable the more obscure lists (anything not from Firebog would be more obscure)
Further whitelisting:
In addition to that I recommend looking at the Pi-hole commonly white listed domains and well whitelisting those.
Also consider adding these, there is the auto updating one(no release in a while though) or you can do it manually (recommend):
I have a similar number of blocked domains to yours but I slowly added to it over time so that I wasn’t overwhelmed with blocked sites lol (false positives)
P.S Please do give the FAQs and doco a quick look (don’t have to commit everything to memory).
Probably will take 30mins but will give you a lot more context about everything