I used to be in a boxing club for 4 years and pads were not used. Ever. Then moved country and the so called boxing classes were more of a choreography with pads and I hated every second of it.
The movements and punches succession often are not what you would use in sparring, if you have opened up on one punch it would be unnatural and very unwise to then move to the opposite side . The couple of times I tried these classes here, I was thinking all the time " no way, ... wrong.."
"real " boxing is way faster, fitness has little to do with it, you need adrenaline and a tiny bit of aggression, in other words the will to crush your opponent. In. pad-boxing , there is no guard, no avoiding , only the occasional squatting when the person does this circle thing above your head.
Bottom line, it will depend how good your fitness boxing instructor was and how natural it is for you to protect your face with your gloves. By the way, you need a proper mouthguard, not one pharmacy one that you shape on the stove.
Ideally, before doing a match, have a session in a boxing club, to see and feel the real thing. Real uppercuts are so different, they start higher, they can come at an angle, and the experience of being hit the first time can be very unsettling.
A punch can hurt, you can get hurt.
Boxing however is so addictive . My advice, go for boxing in a real fight gym not one that also does Zumba. Don't enrol in a match without having tried or seen live the real thing.