Completely understandable.
Please, feel free to post in this game jam's help available / help wanted section. As well as the itch.io community section at the top of the page may have someone looking some sound outside this jam, you might be able to find something there and get that practice in.
Itch.io also has its own section for game tools, soundtracks and assets, so you might find some success posting some free samples or selling some sfx or music as well.
Good luck, hope I helped