I prefer and recommend the very simple boglehead approach to investing. Simple 3 fund portfolio, focused on long term growth.

https://a.co/d/8xXwikV

Lots of forums on their website, but basic idea is split your money into a healthy mix of total market, international, and some bonds. Focus on tax advantaged retirement accounts. Invest early and often.

https://www.bogleheads.org/wiki/Bogleheads®_investment_philosophy

Specific guidance for Italy: https://www.bogleheads.org/wiki/Investing_from_Italy

They are restricted. California has an insurance commissioner who has to approve any rate increases. It’s probably easier to stop insuring then to get the rates up to the profitability margin their risk models are suggesting are appropriate.