So I brewed my first batch of beer and did everything by the book. The water was at 172 when we added the grains and after we took them out we brought it to a low boil and added the first set of hops, after 20 mins we added the second group of hops. 20 mins after that we brought the wort down to 70 degrees and aerated it. During this time we re-hydrated the yeast by putting it in 1 cup of warm water and letting it sit for probably 40 mins. The first 20 mins the yeast was uncovered and the second 20 it was covered.(mightve ****ed up there). We then added the yeast to the wort and then put the wort into the carboy and put the airlock on. It is now 24 hours later and there is no sign of fermentation. Also the OG was 1.041. Should we add a new packet of yeast or give it more time? If there is anything wrong, where did we mess up? Anything helps.