Final answer:
Ren is indicating that Willard should not stress over the first date and to approach it with a relaxed attitude because there will be more opportunities to connect in the future.
Step-by-step explanation:
When Ren advises Willard, "it's only the first date," he is trying to convey D) Relaxation about the date. This phrase suggests that Willard should not put too much pressure on the situation or have overly high expectations. It's a way of saying that the first date is just an opportunity to get to know someone and that there's no need to stress too much about it. Ren is likely implying that there will be more opportunities in the future to develop the relationship if the first date doesn't go perfectly.