There isn’t much destkop specific content out right now. This is too new, and it’s in alpha.
I am not very familiar with Jetpack Compose myself, but I’ve been learning by
1. Looking up Jetpack Compose guides. There are plenty, and most of the information about creating UI’s is directly applicable to Desktop Compose.
2. Looking at the example applications in the
compose-jb
github repo.
3. Asking questions in this channel. People have been very responsive.