The navigation bar is all you need to get started. From there, you can go to Teams → select any team listed.
Each team page displays its most commonly used lineup, a choice section on the right, and bench options for other characters you might use.
On Mobile, scroll down for the equip section. Characters are displayed left to right, from best to worst.
The first equip from the left in Section will usually be your must have equip. Any equip in the extra options for section 1 will usually be a replacement for the right most equip.
The Extra / Notes section shows other equipment options depending on specific character pairings within your team.
That’s it — hope you find this helpful and have fun!