Actually no I was not faster on MT. My best time was on AT- 1'54.847. I was utterly shocked cause I shifted those gears up and down really quick.
Others already commented, but, to give my 2 cents...
The proposed gear (the one in the red box) is what the CPU would do for your if you go AT. Since you are not new to the game and to the tracks (meaning you know what the track shape is), I'd completely ignore it. I'll figure out youself what is the proper gear to use depending on the track-car-personal style combo.
Keypoints to get the best from MT are
Downshift:
you can choose the moment you want to do the first downshift
you can choose the moment you want to do the last downshift
given these two you can rhythm the reamining downshifts
Since you are new to MT I'd keep it plain and simple by now: identify the final gear and rhythm the shift to reach it
Once you become more advanced you can try more aggressive approach, if you like
example:
plain downshift from 6 to 3: 6-5-4-3
more aggressive: 6-5-4-3-2-3
Upshift:
the starting gear is the one that gets you the best accelleration given you ability to manage the spin of the wheels. This is why most of the time a higher gear is better.
for the other upshift there are lot of tutorials on youtube (or simply look at when RPM a good one shifts). It's car dependent. Bottomline here is to shift when the torque curve is at its highest, otherwise you loose time
I'd also like to chime in a bit on personal stuff:
I see you have difficult moments right now, and difficult moments may disarm sometimes.
Please see GT7 as a way to lower pressures, not to generate additional one on top of what you already have.
Enjoy your result. In my opinion, givent your recent start with MT, an MT lap event 5s slower than a At one is a good achievement. Trust me you will quickly get faster with MT. So don't be discouraged, in fact pat yourself on the back and tell yourself that you did well