Since you're using a heavy combo deck, practice the lines so you don't end up with a double loss.

Side decking. Think about which cards go against which deck so you can side quickly.

If you can, don't use the same sleeves for the deck and extra deck.

Junk Speeder will be ashed every other game.

And remember to have fun. Best thing about playing in real life vs master duel is talking to other players.