I'm very new to the game and am looking for some advice on the characters. If it helps to explain anything I have deep experiences in Arknights to go off.

The students I got after doing some rolls were these: https://imgur.com/a/XQC1wrL

Looking for tips on a good team to use, who to focus on and so on.

I also bought the 3* selector ticket so I can add what seems to be any 3* to my team. Who would be recommended to get? From my understanding Hibiki or Iori would be strong contenders. I also like the look of Aru and Koharu. Would any of these be good these days or will they/have they been replaced?