Current battle on DCGO

I'm new to Digimon TCG, and a lot of friends told me to get used to the system by playing DCGO. Today, I played against a random opponent using Zephagamon + Imperialdramon PM, but I never won a single game. Strangely, I kept matching against opponents with a lot of AncientGreymon decks. My intention in playing this game was to get used to the Zephagamon deck, which I really like. But since I've been losing continuously, I've lost the motivation to keep playing, lol.