!languagelearning@sopuli.xyz is one, but I suppose you're right that there isn't one on Lemmy.zip.
The website looks simple and nice at first glance. Plenty of potential! Might I suggest a way of importing words too, like in different languages?
Learning languages is great, and I hope you'll do well with the community! Make sure to introduce the community on places like !communitypromo@lemmy.ca and !communitypromo@feddit.org to try and get some additional traction.
I'm at A1 myself with a different language, and things are painfully slow at progressing, so every bit helps!