Likelihood?

I attended WOW this fall and absolutely fell in love with the school. I plan on applying Early Decision. Is it true that there’s a higher chance of acceptance through this process?

Only an admissions officer could answer that with accuracy. But I can tell you that members of the class of 2022 were explicitly told during an assembly during their WOW orientation that most students who are accepted to and attend WOW are admitted. That sounds like there is no guarantee, but that if your application is solid, you stand a very, very good chance.
Applying ED makes the odds even better.
Lots of luck!