I'm not sure what OPs definition of fun is. Do you like big brain decks that really require skill or do you prefer auto pilot decks that are easy to handle but can become a bit boring?
Maybe you just want to watch some duels on YouTube and see how certain decks play.
Starting this box you have basically 2 decks: Satellar and Onomats.
Satellar requires at least 1 Batlamuys.
Onomats requires some SR of next minibox and the draw 2 spell rare card in the next water main box. I would skip Onomats, and complete satellar.
Satellar was my first deck, which I went to onomats. Pretty fun both of them, and having played them, wanted to know what would be the next best choice.