There are hundreds, if not thousands of plans available. Just google. Visit your local library, bookstores, news stand or home improvement center for magazines on this subject. You will find more than you can imagine. This will give you a jump start.
Better Homes & Gardens has been featuring house plans for many years. I just checked, and they have plans created in 2018, just do a search.
Go to open houses sponsored by Realtors every weekend and see different styles of houses.