Not for the very first tutorial (without resetting your app), all other tutorials can be pulled up again.

The tutorial should give you enough resources to brew your first potion and sell it. Then you’ll have to go for a walk to find more stuff :)

There’s plenty around, if you’re not in a city just walk your usual route and interact with what you find. There’s some easter eggs too. In a city with blocks you might be able to use the markers to track down resources, but it’s not necessary to play like that.