Old player returning to the game

Hello everyone. I was playing Genshin Impact four or five years ago, and the last update was Dragonspine before I left the game.😅 Now I'm returning to the game, and many things have changed, like new areas, a fishing system, playing music, and the Serenitea Pot. I'm still confused and trying to fully understand everything in the game, so if you have any advice or guides for me, I will be thankful. These are my characters, so give me your suggestions for my team and which character I should focus on? I got new characters and don't know anything about them. And the last thing: which character should I wait for and save my wishes? I'm F2P and my AR is 49, by the way. Thank you.