Stats don’t reset for players (Im assuming you mean in your HUD). They do reset for you in each session so you can see how you’re playing at the table. But if there’s previous history with opponents, it will show in your HUD. The only way data wouldn’t show is if you had a filter set in your HUD. But if you didn’t change anything, that would be present.
As far as tutorial’s, there’s several in the knowledge base. It depends on what you want to do, but any of the ones with video have good info I’d recommend: