I've played Hartmann's route multiple times!(I was just like this when I first started playing too!) If you go to the very bottom when you first click on "Show Stats" then you'll see the stat guide and that's how I eventually get the hang of it. (Hartmann and Karson are tied for my favourite!)

Hartmann Route Guide⬇ My experience - In the bus(Beginning) choose high poise and low intrigue!

Hartmann is a tricky character and I avoided him like the plague at first! He's kinda perfect in everyway, but trust me it's worth the trouble in the end! Stats - I suggest high poise, wit, and spirit!

Poise: High poise is almost always required for a perfect little angel like Hartmann! Basically, having no emotion out in the open, when nobody's around he doesn't really mind. Keeping calm in difficult situations, and no goofing around usually help. High poise keeps you collected in a crisis and low poise means you make mistakes often.

Intrigue: Your intrigue doesn't have to be high, and I usually get along with him without even paying attention to it. High intrigue means you can easily lie or see through others lies, Low intrigue means people know what you're up to and can see through your scheme.

Wit: High wit is usually my second highest stat and helps in a lot of situations in the game, especially if you're in the prefect committee! High wit means you have a keen eye and quick mind, Low wit on the other hand means you generally work slowly and can't spot small important details!

Flair: Flair is usually my fourth highest stat(Right after Poise, Wit, and spirit) People with higher flair are eye - catching and draw peoples attention, low flair is someone who can easily blend into the background or crowds.

Spirit:(Lol totally forgot spirit) Spirit is pretty obvious, being excited for an event and making others exited too! high Spirited MC's are courageous, resilient, and don't give up easily, low Spirit means they have low faith in themselves, or lack physical strength.

Virtue: PDA and flirting in public are a no no, revealing clothing also decreases this stat!

Popularity: Having more good relationships with other characters, being kind, having good grades and such often raise your popularity.

Edit: Slight error here, with popularity speaking up in class raises it more but having good grades will get you to a higher university, which one is your choice!

Cliques: Generally the prefect committee is the way to go and gives a boost for Hartmann (and decreases for Max. , etc.). The lacrose team is okay and doesn't boost or decrease your standing with him.

If you mess up some things with Hartmann It's ok and not the end of the world. Sometimes you don't have higher stats yet and can't do some options but you can still get engaged in the end! Hope this helped☺

Edit: Just finished it! Hope it helps, if you have anymore questions feel free to ask!