What I’ve heard from people who moved there (and either stayed or came back) is that being Charedi in Israel is a lot more restrictive, for better or worse.
Certain freedoms given to kids in America (like playing sports) are not allowed in Charedi societies in Israel. So if you aren’t prepared to be 100% committed to societal norms (not really halacha, but society rules) then you won’t fit in. It can be very hard on kids coming from America.
If you fit into Chardal, it shouldn’t be as much of a problem.