How do I activate Google Gemini?

Excuse me, could you please elaborate on the process of activating Google Gemini? I'm not entirely familiar with the steps required to get it up and running. Is it a feature that's accessible through my Google account, or is there a separate registration process involved? Additionally, are there any prerequisites or specific requirements that need to be met before I can activate Google Gemini? I'd appreciate it if you could guide me through the entire process, step-by-step. Thank you in advance for your help.