Ask away, the only stupid question is the one that isn't asked.
I would do 50% today, try to pick up a test kit tomorow. Test the water daily, when it gets past 1 ppm ammo, it's time for a water change. Use the gravel vac weekly on the gravel, many people suggest doing half of the gravel weekly, as this doesn't disturb the nitrifying bacteria that is present in the gravel. If you are cycling you don't want to disturb it too much. I don't clean any orniments unless they start to look grungy, I would leave them alone for now, as any surface in the tank holds some nitrifying bacteria, though most of it is in the filter media. You do need to add dechlor every time you add water, chlorine & chlorimine in tap water inhibits or kills nitrifying bacteria.
I would do 50% today, try to pick up a test kit tomorow. Test the water daily, when it gets past 1 ppm ammo, it's time for a water change. Use the gravel vac weekly on the gravel, many people suggest doing half of the gravel weekly, as this doesn't disturb the nitrifying bacteria that is present in the gravel. If you are cycling you don't want to disturb it too much. I don't clean any orniments unless they start to look grungy, I would leave them alone for now, as any surface in the tank holds some nitrifying bacteria, though most of it is in the filter media. You do need to add dechlor every time you add water, chlorine & chlorimine in tap water inhibits or kills nitrifying bacteria.