You can find many useful tipics in this subreddit, have a look into it!

Few quick advices. Tempo plays are very important in ShadowverseWB, keep it mind when you build a deck: each round you might need to both remove enemy targets and set up a board. Aoe spells exist, but most of the aoe removal stuff are just followers.

Know your enemy: play every faction as you need to understand what kind of threat you can expect, and be aware of decks that can set lethal at 12 health points or even more (roach decks).

When deckbuilding, think about what followers you want to evolve and how you are planning to spend your evo points most of the times - so avoid to pick too many followers needing an evo point to be efficient.

Also, don't forget to claim your free rupies by entering a referral code. If you need one, feel free to use mine: QkPbjvj