People who changed their religion to a different one (or went from atheists to believers) - what convinced you to think that your religion is the right one?

Sorry for making it long, no need to read it all to answer.

Asking because I'm here questioning everything I believe in, or don't. There is a religion that interests me, but my head goes: how can I know that this one will be right, out of all of them? Statistically it's so unlikely, unless you decide that certain religions are more likely to be right, but how do you decide that? You like what the religion says so the god/gods, and other "not scientitic" things from it become believeable? I haven't checked out every religion (it's not even possible) so how can I make a choice? There are beliefs that sound very good, but it doesn't make them real automatically.

I'm absolutely not saying you should have that approach, but I am very curious what will be your answer to my question and, if you had similar concerns, what made you stop having them? I feel like my post might sound pushing this way of thinking but it's not my goal, I just want to know how can that be approached. So sorry for my wording, no idea how else to say it.