Welcome to the forum.
Basically UHF and VHF are 2 different frequencies tv transmit on. VHF is considered Ch 2- Ch 13, and UHF is Ch 14-69. So in your case you would need a UHF/VHF combo antenna since you have some stations transmitting on VHF and some on UHF. Look in the "real" column, that will tell you the actual frequency the station broadcasts on. Note the "virtual" freq is just what the station renames itself on your tv when you select channels. For example, ION is on real 43, but if you are watching tv, it will say Ch 59.1
The radar plot on the tvfool report basically shows a view from above of your location, which is the center, and where the TV towers are in relation to you. For example, if you look at the chart, KLWY-DT Fox is 36 miles away from you with Line-of-sight (LOS) to the towers, meaning there are no obstructions in the way. And it is at compass reading 20 degrees, almost to the NNE. If you look at the radar plot, you will see a line pointing at about NNE with a number 27 on it. Thats where you would point your antenna.
The table shows stations in order with the station with the greatest signal strength on top. You do have some strong stations at the top, but they are all in different directions and appear to be the Wyoming stations, so you will probably need a rotor.
As you go down, stations have weaker signal. And if you notice in red are your Denver stations 57 miles away to the South with 1 and 2 edge reception, meaning the signals have to bend over a hill or obstruction once or twice to reach you. This is why the higher you mount your antenna the better. This is why you should run your tvfool report again, but this time plug in antenna height to see if the results improve, but regardless, You will need a Big VHF/UHF antenna with probabaly an amp. I don't think a small antenna is going to cut it.
You also might want to ask the in the Denver OTA forum for advice and what reception is like in your area.