Yes goo is required for puncture protection.
Take your wheel off, hold it vertically for a few seconds to let any fluid drain down to the bottom, then give it a shake and listen for some sloshing. If you can’t hear anything I’d add some stan’s fluid.
Don’t unseat the tyre! Fluid can be added through the valve because it will have a removable core.
Deflate tyre, take out the core, add fluid, put core back in, re-inflate tyre, go ride