

totally agree—the Boglehead approach is one of the most practical and low-stress strategies out there. A diversified 3-fund portfolio with long-term focus really does simplify investing without sacrificing performance. It’s especially valuable for people who want to build wealth steadily while minimizing fees and market noise.
It’s great that you’re eager to learn—your background in data science actually gives you a big edge in understanding personal finance logically. I’d recommend starting with practical, proven resources like the Bogleheads wiki and the book “The Bogleheads’ Guide to Investing.” They focus on simple, long-term strategies that work.
The MIT Finance Theory course is solid, but it’s more academic and may be overkill for personal finance goals. Start with foundational topics: budgeting, saving, indexing, risk tolerance, and tax efficiency—especially in the EU context.