How do i move to the frontend to see if my Custom Objects are created?

Am I on the right one please

Who are Our Customers as a Salesforce Admin, is it the company or the buyer who is buying from the company?

I tried accessing the training, but it is still locked. I made attempts to sign in to the platform, but it was unsuccessful. Maybe there is something I'm not getting right. Really need some help here!

Please I need help , my developer org has Agentforce and look different from what I saw in the lesson ,