you cant work in udon on 0.3.9.1, wait for next update (ie in a week)
continue stamina training , it only caps at 11 i guess, and stamina training progress unlocks the girls sitting at the bench shown in the top of this page.
You can see a message on top left side of screen, when you complete the game. (like you have completed 100%)
If you got blowjob scene, its not dominant path,, that's blackmail path. and the end of events with Noriko in that path. but sadly you can't unlock cheat menu, since this route wont allow to enter her room to collect money