Like @raptor said, you won't lose the $100 deposit. If you exchange any money with the dealer when/if you convert your order then it may/may not be refunded. That's between you and the dealer, but most dealers will refund you.
You likely won't get a 2021 if you convert. If you don't convert you will not get a 2021.
If you do convert you'll likely get a 2022. If you don't ever convert you won't get a 2022.
Edit: this year will be model 2021.
Like @flip said, this shouldn't be a big deal. I've bought quite a few cars remotely. They should just send you all of the paperwork via DocuSign, or worst case they can overnight you hard copies. Depending on how you're paying/if you have a trade is just details to workout during the...