Here are a few perfume/aromatherapy/formulation schools we recommend.
Fragrance Alliance Network
Here in New York, we have the Fragrance Alliance Network, in lower Manhattan. They have a vast variety of workshops, classes, intensives, and events, all in person, on everything from an Agarwood Master Class, to Rose Accords, Aromatherapy, Wine and Fragrance, and Finding Inspiration for Your Creations, but there's a lot more. Founded by Gus Romero, with plenty of special events and a variety of teachers and lecturers. You can find them at
https://www.fragrancealliancenetwork.com/
The Institute of Art and Olfaction (Los Angeles)
If you live on the West Coast or travel there, this might be the place for you. Founded by Saskia Wilson-Brown, they offer a wide variety of classes, workshops, intensives, and even some international aromatic retreats. You can find art exhibitions, The Art and Olfaction Awards, Scent Week LA, and lots more. There in LA's Chinatown, 932 Chung King Road
Los Angeles CA. 90012
NYC Aromatica
Founded by Amy Anthony, and based in New York, NYC Aromatica specializes in aromatherapy and personal care product development. Some classes are available online, and some can be found at the Fragrance Alliance Network. Amy Anthony also does corporate workshops.