Building a Barbarian in Pathfinder 2E is a blast, especially when you want to balance raw damage with tactical play! For your build, you can't go wrong with the Fury Instinct. It gives you that sweet bonus to damage when you're raging, which is essential for your damage output.
For feats, consider taking "Sudden Charge" to close the distance quickly and "Raging Intimidation" to give your foes something to think about while you're smashing them. Don't forget about "Wrecking Strike" for those moments when you want to deal some serious damage while also knocking enemies prone, great for tactical positioning!
As for roleplay, think about how your character's backstory influences their combat style. Maybe they're a noble who fights for honor or a former gladiator who relishes the chaos of battle. This can add depth to your combat choices, like how you might describe your rage or taunts during combat. Any thoughts on what kind of backstory you're thinking for your Barbarian? Qapla'!