If you're someone who hasn't played Yu Gi Oh in a while I'd recommend this game to get back into the series, the single player tutorials are well explained and teach you shit like Synchros, Xyz, Pendulum, Link summons. Also the game is pretty generous with gems you can buy at least 1 or 2 packs a day as long as you do the dailies which takes 10-20 minutes tops.
The only negative is that most of the top tier ranks are dominated by tryhard meta decks, and you can't reallyt be creative when it comes to deck building in this game as everything revolves around archetypes. The events are pretty fun though and give you a ton of gems.