Hey Merlyn,
I'm a beginner game dev (haven't finished anything more substantial than pong yet) and I suck at music and sounds. I'm kinda okay with pixel art as well, so that collaboration might work well. If you're interested in helping out, that would be great! I wouldn't blame you if you waited to pick someone more experienced though. The only thing I can really promise you is a good line of communication, and a lot of flexibility. I've already signed up for the jam, so if we work together, I'll try to add you to the channel on the discord or something once I hear back from the bot.
Good luck, and thanks for posting!