No problem. OTA can be difficult and a pain so actually requires some research and varies from location to location and even house to house. The rules of thumb are this.
1. Higher the better.
2. External over internal
3. Old school is the best. Meaning the older antenna designs are the best
4. Stay very very far away from Terk. They are expensive and not very good
5. You need a powered pre-amp if signal over 100 feet from antenna
6. If your tower locations are in separate areas, you many need a rotator or 2 separate antennas coupled together. I have a separate UHF and separate VHF at opposite ends of house that eventually get combined to one line into house. My ABC is south and the UHF ones are north so much better to have separate since different locations and signal types.
7. Make sure to ground it
8. You need a separate line for OTA now. 5 LNB dishes do not allow coupling OTA and Directv signal due to new Sat ka band.