Help me please.

[AmaGhoul]

Please help me. I'm stupid. I set up a visual studio for the first time in my life.(and net core 3.0) I don’t really understand what I'm doing, but I get a few dll libraries. And so in each of the 3 parts of what I took here.

How to put this together to make it work? Can someone give instructions for dumb people like me, please? https://imgur.com/a/nMdiRLc