What hint do you mean that I do not follow?
I cannot see a single hint there, that I can fullfill.
So tell me what hint do I ignore?
According to the opportunity you still have to explorer Alice's drunken party options and talk to her about it.
According to the opportunity you did not install all cameras yet.
According to the opportunity you didn't give Lisa her red siwmsuit, but that train has passed.
Mentor: try to learn whatt you want to teach. Who could teach you?
Schoolgirl: "It's not very typical of me " .... so try something else.
Spiders: There are several variations of what you can do. Most important: try to make her take her top off before the prank. Have you tried the shower pranks as well?
Olivia's questline .. just go with it. Follow the plot. There is nothing to figure out really. Just talk to her when she's at your home.
There is nothing not covered by the walkthrough. Really, read the walkthrough. Just do it. Like ... right now. Most of your questions will be answered by the walkthrough.
Also keep in mind that sometimes you need to complete one opportunity to unlock scenes for another. For example you can only get to kissing scenes if you took kissing lessons from Kira. Lisa won't be topless while watching movies in stick or carrot until she is used to it, that happens in Olivia's quest line.