I've been playing solo although not got far yet. Keep starting over as I learn new things! But single player is well balanced and you can approach it in different ways depending what mood you're in.

Fancy just chilling at home? Go farm some wood and meat and spend time building.
Want some adventure? Go exploring with your best weapons and armour and see what you find.

Just remember to mark things on your map...

And don't melee trolls like I tried last night.