R2 Test Drive 7/4 - need top 3 things to check out!

We get 15 minutes. My wife and I both want to try it out. Order invite ~Dec. 2026 - Feb. 2027. Very excited!! I want to be sure to use that time wisely and I’m also afraid I’ll forget to look at - or try something. What are the top 3 things I should not leave without testing out?