If youre new and feel intimidated by not knowing the most powerful cards, just go with your gut and pick the cards or abilities that appeal to you - even if thats just choosing your favourite Disney characters
The starter decks available at launch are Amber and Amethyst (featuring Moana and Mickey), Emerald and Ruby (featuring Cruella and Aladdin), and Sapphire and Steel (featuring Cinderella and Simba)
Since you need to have exactly 100 cards in your deck and there is a relatively small list of banned cards (the Commander card pool includes almost all official sets), this kind of limitation is what makes the game more tactical
"Warning: Contains Final Fantasy IX Spoilers"
Look out for me in some of those threads - these Lorcana starter decks were more than enough to get me interested in learning more, and they're a good time for anyone looking to educate themselves on how the game works and whether or not it's for them.
This is just the tip of the iceberg of what Ravensburger is bringing to Reign of Jafar, and we are already truly impressive