This is how I'd set it up.
Add an "Effect" action to the spell in the bard's actions tab. Right-click on the Inspire Courage spell and select Add Spell Action -> Add Effect. Click the magnifying glass to the right of the new effect line that's been added and enter:
ATK: 1 status; DMG: 1 status; SAVE: 1, fear and make the duration 1 round.
https://www.fantasygrounds.com/forum...chmentid=29554
then, when the bard casts Inspire Courage, the player can select all allies (Friendly characters in FG terms) within range (either manually or by clicking the "Target all friendly units" button in the image toolbar) and then clicking the effect button to the left of the new effect you've just created. This will apply that effect in the combat tracker to all targeted creatures for a duration of 1 round.
It sounds like you've never really used effects before. There are a few videos in the Wiki regarding effects. Not necessarily specific to PF2, but the process is similar between a lot of FG rulesets - look for videos from 3.5E of PF1 and it'll be 99% the same as the PFRPG2 ruleset.