Well, everything depends on how deep is your pocket. If you Have enough funds, you should purchase some good cards like Mylor and Yodin and Chaos Legion booster pack. If not, you should accumulate DEC and reward from the box before trying to rent cards.

Renting price is still so high, which is not easy for new players to afford, and at the end of the season, some renting prices will double or triple times than usually.

Regard and Welcome to the community.