I think BJJ has a pretty strict policy of not accepting girls who live in Israel; I could be wrong.
Chedvas is veeery different than Pninim; not just more BY but a totally different mentality. You have to make sure it’s your style, maybe sit in for a few days on classes. If it’s your type, you’ll love it and have an amazing year; if not, you’ll be miserable as it’s a very distinctive style.
And you’re lucky- while American-Israelis go to Chedvas for their first year, for Americans it’s their shana bet, so even though it’s a very frum BY place, they let you have laptops and have a much more lenient internet policy.