To take the measurement, place your mic at the listening position. Load the appropriate calibration file. If it's a 0deg, point it between the two speakers. If it's 90deg, point the mic at the ceiling. Then take a sweep of your left and right speaker individually with a timing reference. For everything you could possibly want to know about room measurements, read
this.
From what I can see of the two sets of measurements you have posted so far:
Your RT60 is a bit high. Depending on the size of your room (and from your photos the room looks pretty small), it is probably very high. To know the RT60 target, I would need to know the dimensions of your room (L, W, H). Regardless, it looks like you would benefit from some kind of room treatment. Room treatment doesn't have to be acoustic panels, it can be carpet, curtains, soft furnishings, draperies, even indoor plants. Toole says that the RT60 target can be achieved with room furnishings alone. So just get something in there.
That frequency response looks pretty unpleasant with two nasty big suckouts. The lower one at about 45Hz is almost certainly a room mode. It can be fixed with better speaker positioning, or better listening position, or subwoofers.
The one higher up between 200-300Hz is more concerning. That is squarely in your lower midrange and it will have the effect of "hollowing out" vocals, especially male vocals. That dip is wide and deep and is unacceptable. It may be a speaker flaw, or it may be related to how you positioned your speakers (i.e. SBIR). The easiest way to diagnose it is to look for published measurements of your speakers, but I can't find any with a quick Google search.
The design of your speaker is makes me worry. If that woofer mounted up top is crossed over too high and it's not integrated properly with the mid, it may well be the culprit. I certainly hope not.
At this point, the possibilities for this dip between 200-300Hz are:
1. It is some kind of measurement artefact,
2. It is real, and due to incompetent speaker design,
3. It is real, but due to speaker positioning.
Right now, you are very much a beginner at taking measurements. It is possible to diagnose the cause of this dip, but you will have to learn a lot very quickly. If you are prepared to do that, we are of course prepared to help. But right now you haven't yet figured out how to take independent measurements of your L and R speaker, let alone some of the more advanced measurements you will need to take to find out what is going on.
For now, I suggest:
1. Read the book and make sure you know how to take measurements correctly.
2. Write to the manufacturer and ask for measurements of your speakers.
3. Think about how you would like to decorate your room and improve the acoustics at the same time.
There is lots to say about the other measurements as well, but for now these should be your priorities.
