Anyone got a good Urara build? Need some inspo.

Urara!

Alright so I just blasted ropes to this pink haired bitch and now I'm downloading this game. Looking up some guides they all talk about rerolls but I'm not 100% on the terminology. Never played a gatcha before other than granblue years ago either so complete newfag. I'm guessing this is just making a new account and then reusing the free SSR ticket you get from signing up?