Beginners Guide

General Information
At the beginning it is important for you to go as far as possible in the campaign (story), because this is the main source of resources to level up your girls. Challenges are also a high priority. Journeys and Events can give you some resources so go through them as much as you can but don't make them a goal. Be sure to use the reset feature if it helps you pass an extra stage of the challenge. At first you will really need stars so use the gems to buy x5 Super Gacha, better if it will be an event gacha especially the legendary one, but if there is no such then you can and on the usual

Team Building
At the beginning of the game your team will change very often. Since the game has a feature to reset the character to return the spent silver and crystals, you should not be afraid to upgrade the "wrong" characters. The best composition of the team for the beginning is the main tank, additional or another main tank (as enemies can be both melee and ranged, read Combat Basics) and 3 attackers (preferable to have at least one top tier, character table is below). Main tank and main attacker is better to keep a few levels above the rest. The second thing to take into account when making a team is the elements (water, fire, wind), affinity gives a significant bonus so it is recommended to have affinity 3 or 4. Advantage of the elements also plays a role, but not as major as affinity. Legendary girls are very strong and usually have close bond with their faction, so as soon as you obtain one it's probably a good idea to rebuild the team using a legendary character as the core