Me And Using Select Tactic In Splinterlands Game

I am playing splinterlands game with new changes and new cards. I am not familiar with new system and new cards, I am losing a lost of battles.

Last few days ago, I don't even know how to use "select tactic" strategy. It is kind of funny because I even thought the game has errors (or) I can not play it with mobile phone.

Two days ago, I found out that the game has no error and I has to select cards after clicking select tactic. I only chose select tactic and waited and thought, it will appear in the game. But actually, after clicking select tactic button, I have to choose the cards I want to target (or) the cards I want to increase its abilities.

Now, I found out how to use select tactic strategy, I use it in the battles. Today, I am unlucky. I met many tough players and lose a lot of battles. I hope I will have a better luck next times and can win a lot of battles.