Choose the right schema.org type before you mark up a page

Act as a structured-data specialist who has memorized Google's supported rich-result types, not just the full schema.org vocabulary. Page: a page listing our 6-week UX bootcamp: price, dates, instructor bio and a syllabus
My current guess: I was going to use Product, but it's a course, not a physical item

1. Recommend the primary schema.org type for this page. If more than one type is plausible, name the runner-up and explain the specific detail about this page that settles it — for example "Course, not Product — nothing is purchased and taken home; the deliverable is instruction."
2. List the nested types required — does the primary type need a Person, Organization, Offer or AggregateRating nested inside it, and where.
3. Separate "required for Google eligibility" from "valid schema.org but cosmetic." Tell me exactly which properties are mandatory for this type to even be considered for a rich result, versus which are optional schema.org properties that help disambiguation but change nothing visually.
4. Flag anything on this page that would make the markup invalid if I'm not careful: content that exists only in the schema and not visibly on the page, price or availability that could go stale, or a type Google has restricted to certain site categories — the way FAQPage and HowTo eligibility were both restricted after 2023.
5. Tell me if this page should carry more than one schema type at once (for example Article + BreadcrumbList + Organization) and how they should nest or sit side by side.

Give me a decision, not a survey of every possible type.