Your NBC station real channel 24 will require a UHF rooftop installation.
The simplest way to receive NBC 24 and still receive the other networks is to use an Antennas Direct DB4 UHF antenna aimed to 163 degrees magnetic. If you fail to receive the CBS station to your West, you can remove the reflector grid from the antenna which will convert it to a bi-directional.
Shop for this antenna and choose a mount that fits your home at
www.solidsignals.com.