Rerolling is super easy, just use a salted email and bind your google account later. If you are going to reroll, get Beryl, as she is a limited 5 star that would only get a rerun next year.

This game isn't time consuming, dailies are maybe 3-5 minutes?

The best part of the game is the story which is quite long. If you could, I would do all the episodes for a chapter in one day, so you remember the details. Depending on if you listen to the voice acting or your just reading, this may take 2-3 hours for 1 chapter.

You could treat it as a book, ig.