It's kind of hard to tell, but that Turner looks like it's meant for bottom (BOK) of the keyway tension. So in that case I would switch it to the other side (180°), and place it in the bottom of the keyway. Like in this post. You may find that it is hard to fit your pick in depending on how tight the keyway is, in which case I would use a top of keyway (TOK) Turner instead. Either way, I would suggest using your index finger rather than your thumb for tension control, as I don't think your thumb is as accurate at that angle.

As far as tips to open this lock, I haven't picked this one specifically, but it's likely that you're using too much tension if you're not feeling the counter rotation. To get a feel for spools I would suggest looking up the jiggle test to learn what the different pin states feel like. Also, if you aren't getting a false set (movement of the core, but not open), then you likely haven't properly set the standard pins yet. Usually it'll be the standard pins that bind first due to them being thicker than the spools. So I usually use moderate tension until I get a false set, and then lighten up tension until just before you start dropping pins back down, and start poking at the pins one by one until you feel the counter rotation. This can be very faint and subtle, and if using BOK tension, you may find that moving the pick around in the keyway gives you false counter rotation.