R1s shop access - nothing available

I have questions I'm hoping some of you can answer. I'm a pre-March 1 R1S reservation; actually made it under the wire by just 26 hours.

At present, I have a January - June 2024 delivery window, so still a ways out from delivery even if my window improves with updates.

At such time, if any, that I'm given access to the R1S Shop, and if I find a unit there that I'd like to take, here are my questions:

1. Will I pay the post-March 1 higher price or will I still be able to take advantage of the old price point?
2. Regarding the tax credit, will this still count against my pre-August 2022 sales contract?

Thanks to any of you who know the answers and have the time to share your knowledge.