i litterly just joined itch.io a couple days ago
so i dont know what yu mean by*mini* jam and *power Theme
maybe you should practice before you participate on a game jam, making an original game, and maybe learn other ways to make games, i recomend you to learn coding when you feel prepared, this is for experienced people, if you want to learn, watch yt videos and other things, and never think there is a limit and you can't go deeper, because there is always something to learn, with time, you'll do great things