You have been given some great ideas already! We have a lot of information here in the forum and on the main site about Imbolg so I’ll link a few things that haven’t been linked yet.
Although they’re widely spread, snowdrops don’t grow everywhere. Usually, they don’t grow below USDA hardiness zone 7 because of the cold winters they require. In my research, they generally don’t start sprouting until mid-February or March unless the winter has been mild. You may not see snowdrops blooming yet if you live in the US. For those in Europe where most of the Sabbats originate, it is likely that you’ll see snowdrops blooming soon if they’re not already. Mhara Starling lives in Wales, I believe, and she posted on BlueSky that she saw her first snowdrops yesterday.
Anyway, that’s really long-winded when I just meant to say that you may not see them yet, and it’s okay to look for native flowers in your area instead.