It depends on what type of learner you are and, to some extent, the field of design you’re most interested in. There are many free or low-cost courses through platforms like edX to get you started, and more universities are offering fully or mostly online degrees. (Just make sure they’re from an accredited university that is not for profit!). That said, not everyone will be able to learn fully online. You usually get a little more support for in-person classes. And for some design fields- especially fashion and interior design- I do think there’s a lot to be gained by learning in person too.