Glad you are well. Make sure you limit screen time if you have/had a concussion.

The process is super simple. You just need to submit a photo of the damage along with details of the helmet and they send you a discount coupon (for I think 30% off).

I had a similar experience at 70.3 NC a couple years back. Cracked frame, cracked helmet shell with the foam cracked all the way through, the magnets from the visor shattered off and luckily I walked away a little sore. I did get checked out at the TBI clinic because I have a history of concussions from when I was in the Army and all was clear.
I contacted Giro and they will give you two options.
1. Like said before a unique 30% off coupon for you, can be used for any helmet online.
Or
2. Take it to a local Giro retailer and deal with it through them. Even if you didn’t buy it from that shop they are supposed to still deal with the crash warranty.
I went with the first option because I didn’t t buy it from the local shop and didn’t want to deal with them being less then helpful about it.
Giro will want you to email them the following:
1. Lot number
2. Manufacture date
3. Serial number
4. Purchase date
5. Pictures of the helmet
Was pretty quick turn around.