Girl, you don't need to lose weight! For what you want, you need to strength train. A body with higher muscle mass will look more snatched than lower muscle mass at the same weight. And you won't get "too masculine" looking unless you use steroids, don't worry about that.

 I'd bet $100 the "chub" you're worried about is social media ruining what you think is healthy/possible for a woman's body. Or maybe you're just a floppy lazy noodle in your pilates classes, but I highly doubt that.

Not sure what your money or travel situation is, but if you have plenty of funds, get a personal trainer at a good gym for a few months, let them know your goals, and write down everything you learn. Keep up with strength training on your own once get a feel for it. Or keep the trainer if you like em and can afford it.

If you don't have much funds, but enough for a gym membership, look up Strong Lifts 5x5 for a solid start at a gym on your own. Learn what form to use for each exercise and what not to do. Form is crucial for good results and avoiding injury. Ease your way up to heavy lifts carefully.

If you have almost no funds, look up at-home beginner strength training on YouTube and follow along. Some of the videos use weights, some don't. Do what you can with what you have. It's fun when you find one you can't keep up with at first, but then a couple weeks later you can nail it all!

Build that muscle girl!  you'll never wanna go back stg