Okay, so for tuning, there is a simple rule regarding the pitchbends: Only place pitchbends on notes, that are actually sung in the song! If you look at a ust, and see the notes C, D#, and E are sung, do not worry to place a pitch bend at one of these. However, be aware that if you see that C# and D are NEVER sung, don't place a pitchbend on it. Another note is that you should be cautious with the pitchbends you make!
If you look at the first blue note, you can see a kind of "weird" pitchbend. It goes up and then down. I use it to stabilize a sudden note change like this, as the note changes from C# to F#, which is quite a jump. It can also be a straight line, and can make the transition more natural. Now I mainly tune with VCV banks, so a CV might sound different, due to the missing overlapping vowel.
Now as for these blue notes, I did somehting...well inconvenient. For a high jump, a pitchbend higher than the actual note is usually recommended, however if the jump is not too big, a lower pitchbend can also be the right thing, and sometimes sound better. As for the second and third blue note, I used this pitchbend to emulate vibrato, but in a special way, by placingone control point on F and the other on F#. Now as you can see, the next one is a simple jump, without a special pitchbend. This is because after such an intense pitchbend, another one would make the next note sound unnatural and distorted.
The next thing to teach you is consonant tuning. While it is genereally never wrong to use these "Bridge" pitchbends, upper ones are best used on hard consonants like k/t/p, to make them sound stronger, whereas lower bridges are better used to emphasize on the vowel. You also have to watch where you place the control points for consonant emphasis, at the best either right at the start of the note, or just an eighth after the start.
As for vibrato, you should really only use it on long notes, and watch that the "waves" stay inside the note, or else it will sound off pitch, and not good at all.
I hope I could help you with this!
Now here is how the ust sounds:
You can also download the ust here, to get a more indepth view and practice:
I suggest you to look at the ust, and try to hear the difference between tuned and untuned by removing some pitchbends, and if you have more questions, feel free toaks!