Hi estcstm3:
You might want to go to rabbitears.info and put in your location. It's more reliable and up to date than the tool you listed from TV Fool. If you can post that report, it should help others give you more precise information.
You can also go to Antennaweb for help:
https://www.antennaweb.org/
Assuming your report is fairly accurate, you are close to your towers, but have some 1 Edge issues that could cause reception problems.
If you want to go with an indoor antenna, I suggest the Antennas Direct Clearstream Flex. I have used many different indoor antennas over the years but have found the Clearstream the most reliable. In fact, several years ago we had a similar issue posted on this forum. Here's the link:
https://forum.tvfool.com/showthread.php?t=16647
If you get up in your attic I would use an RCA ANT751, (now listed as ANT754E) to get the best possible reception, since the building materials can lower signal strength. The antenna is portable and a proven work horse by all standards. There have been numerous posts on TV Fool about its performance. But there are other similar antennas that might work better for your situation. You'll have to judge for yourself.
https://www.rcaantennas.net/outdoor/?sku=ANT754E
https://www.amazon.com/RCA-Compact-O...s%2C131&sr=1-1
Please keep the forum updated as to your progress. I'm sure it would be helpful to others!
All the best.....