Overall there can be sort of a mix of detail put in.
Bios/Personalities, I recommend putting in the effort for some detail. But beyond that can be more surface level if that makes sense?
Mainly it has to be enough detail to help me understand them to match them with another character, and then for you to stay in character later.
Really though, donāt stress, and take your time.
Iām sure youāll make great characters. (Even if theyāre not your best, theyāll be far from the worst Iāve seen in previous seasonsā¦ Iāve seen some that were roughā¦)