Course organization & multiple categories for courses

Hello, I'm evaluating Opigno for our school. It seems very nice and powerful, and I have some questions abount course organization and categories. Our school is structured in this way: 3 programmes (electronics, mechanical and bio-chemical programme), each programme lasts 5 years. Usually a subject (later I'll explain why I am using subject instead of course) is associated with one or more years of a specific programme (e.g. Electronics for the 3rd, 4th and 5th year of the electronics programme, automation for the 4th year of the electronics programe etc.), but general subjects could belong to multiple programmes (e.g. Slovenian, Italian and English for all the classes, physics for the first two years of all the programmes etc.). This is necessary due to the fact that we are a school of the slovenian linguistic minority in Italy, so we don't have a lot of students and the general subjects are often grouped together, spanning more than one programme in the same year of schooling. Also: the same subject could be taught by more teachers. If we have a lot of students so that the general subjects aren't grouped together, we could have three different teachers for the same subject for the same year (e.g. physics course in the 1st electronics class, physics course in the 1st mechanical class and physics course in the 1st bio-chemical class. We could also have the same teacher teaching physics in the three classess, but due to the different skill levels of the students, the three courses would have different progresses. We could also have a teacher teaching physics in two classess and another teacher teaching in the third etc. That's why I used "subject" and not "course" in the firsta part of my post. As you can see we have a great variety in how our courses and teachers are organized. I hope that I was clear. So I was wondering how to organize this. To put this in a more schematic order: Our subjects can span vertically (trough years) and horizontally (through programmes The same subject of a specific year could be taught by more than one teacher in the different programmes, or by the same teacher in the different programmes (e.g. physics course A for all the students of the 2nd electronics year and course B for the other two programmes), or by one single teacher teaching all the programmes together (e.g. physics course for all the students of the 2nd year), depending on the classes organization I thought to create three categories (the three programmes), for each category five subcategories (the five years of each programme) and associate multiple categories to the courses, but I see that this isn't possible (a course can belong only to a single category), so I can't create Slovenian course for the first year of electronicsa and bio-chemical programme together. Is my approach wrong? Maybe I should do this categorization at a user group/class level, by simply adding a user group to the course (if it's possible), or adding the course to a class? Or maybe it's possible to create a single course with multiple "subcourses", one for each programme? I was also wondering how to manage the "same subject, different teachers" situation. It's possible to split a single course in multiple "subcourse" as I've asked below? Or should I simply create multiple courses with the same name belonging to different teachers? Since each teacher has different teaching styles, minor variations in his/her teaching plan and diffenrent progress depending on the class skill level, probably they will want to have a certain degree of freedom from other teachers teaching the same subject. Thanks and sorry for the massive TL;DR, but I wanted to be detailed, I hope that our peculiarity could give you some interesting insight for your future Opigno development :)