How can I buy shares in Italy?

Excuse me, I'm a bit confused about how one goes about purchasing shares in Italy. Could you please guide me through the process? I'm particularly interested in knowing if there are any specific platforms or brokers I should be using, and what kind of documentation I might need to provide. Additionally, I'd like to understand if there are any legal considerations or restrictions I should be aware of before making any investments. Thank you in advance for your assistance.