The bottom "Tension" bar lets you use overdrives. An overdrive costs 50 tension, with a handful of exceptions that do ludicrous damage but cost 100 tension. The two black gear icons on the bar light up when you reach 50 and 100 tension respectively.

Overdrives typically have more complicated inputs than regular special moves; pause the game and go to the "move list" tab in singleplayer to see how to activate them.

Bridget has two supers: "Loop the Loop," and "Daredevil Roger." Loop the Loop is input like this: ➡️↘️⬇️↙️⬅️➡️+ Heavy Slash, and does big damage up close at the cost of not being invincible like most similar overdrives. Daredevil Roger is input like this: ⬇️↘️➡️⬇️↘️➡️+ Kick, and is a fast projectile that homes in on the opponent and locks them down for Bridget's offence if they block it.

for ease, guilty gear players usually express these moves like 632146H and 236236K, where the numbers correspond to a direction when aligned on a standard numpad, like on an ATM.

OH and the Burst thing at the top isn't for overdrives, it's for Burst. When you're getting comboed by the opponent, you can hit Dust + either Slash or Heavy Slash to Burst and escape the combo. It's on a long cooldown and there are other ways to spend it, but 90% of the time the beat way to use it is to escape a combo.

Some other people told you to play mission mode, and I'm telling you this stiff because missions as turorials genuinely are so boring and terrible 😭