Your first roast?
Try them don't rest them!
You should try them as soon as they are cool enough to hit your grinder, put the rest aside and try again tomorrow, and then two days later and another 2 days after that if you still have some in a week then try them again.
This will give you an idea of WHEN YOU LIKE THEM... which is the whole point of home roasting, you get to determine what works best for your setup and tastebuds.
If you determine that after day 6 they "peaked" then you will have a better starting point for next time.
Most of all, enjoy the journey!