I wanted to suggest the importance of learning in a Lithuanian kind of yeshiva. The main reason is that Torah is something that one needs to learn from people that know it well. It is kind of like in Middle Ages when you had apprentices  that needed to learn the ins and outs of some kind of skill over a very long period before they could be accepted as members of the guild or "Masters."  Torah is very much like that. The difference is it has its own kind of rules. Just like in the Middle Ages the rules of one guild did not apply to another. So in Torah there is no reason for the arena to be a free for all in which anyone who puts on the right kind of clothing is considered learned. My suggestion is to accept at legitimate only those who have put in the work; and the frauds that present themselves as experts to dispose of.

I think there are a few good yeshivas around especially in NY. Chaim Berlin, Torah VeDaat, Mir. In Israel it is harder to spot a real yeshiva and tell the difference between it and the phonies. The reason is money got mixed into the system. No you can't tell in Israel who is learning because they love Torah and who is doing it because it is good business. It is not just hard to tell. It is nearly impossible.
The ones that you can be sure of are Ponovitch, and Brisk.